| State | Illinois USA |
| Capital | Springfield |
| Short URL | http://thecallphone.com/312 |
| Prefix | Primary City | Company | County | Usage | Introduced |
|---|---|---|---|---|---|
| (312) 201- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 202- | Chicago, IL | Ameritech Illinois | Cook | Landline | 04/01/1997 |
| (312) 203- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 204- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 205- | Chicago, IL | Allegiance Telecom | Cook | Landline | 08/20/2000 |
| (312) 206- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 207- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 208- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 209- | Northbrook, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 02/11/1995 |
| (312) 210- | Chicago, IL | Cook | Landline | 11/11/2003 | |
| (312) 212- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/31/2000 |
| (312) 213- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 214- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 215- | Wheeling, IL | New Cingular Wireless PCS | Cook | Cell Number | 02/11/1995 |
| (312) 216- | None, IL | Cook | Cell Number | 11/11/2003 | |
| (312) 217- | Chicago, IL | United States Cellular Corp. - Illinois | Cook | Cell Number | 11/11/2003 |
| (312) 218- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 220- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 221- | None, IL | Sprint Spectrum L.p. | Cook | Cell Number | 10/11/1997 |
| (312) 222- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 223- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 224- | Chicago, IL | Broadwing Communications | Cook | Landline | 10/13/1999 |
| (312) 225- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 226- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 227- | Chicago, IL | Ameritech Illinois | Unknown | 09/15/2010 | |
| (312) 228- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 229- | Chicago, IL | Ameritech Illinois | Cook | Landline | 06/13/2000 |
| (312) 230- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 231- | Roselle, IL | New Cingular Wireless PCS | Du Page | Cell Number | 01/10/1996 |
| (312) 232- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 11/11/2003 |
| (312) 233- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/13/1999 |
| (312) 234- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 235- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/14/2000 |
| (312) 236- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 237- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 10/31/2000 |
| (312) 238- | Chicago, IL | Broadwing Communications | Cook | Landline | 10/13/1999 |
| (312) 239- | Chicago, IL | AT&T Local | Cook | Landline | 01/25/1998 |
| (312) 240- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 241- | None, IL | Cook | Cell Number | 10/11/1997 | |
| (312) 242- | Chicago, IL | Teleport Communications Group - Chicago | Cook | Landline | 08/20/2000 |
| (312) 243- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 244- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/31/2000 |
| (312) 245- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 246- | Wheeling, IL | New Cingular Wireless PCS | Cook | Cell Number | 02/11/1995 |
| (312) 247- | Chicago, IL | Globalcom-il | Cook | Landline | 08/17/2004 |
| (312) 249- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 250- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 251- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 252- | Chicago, IL | Allegiance Telecom | Cook | Landline | 01/25/1998 |
| (312) 253- | Chicago, IL | Allegiance Telecom | Cook | Landline | 01/25/1998 |
| (312) 254- | Chicago, IL | Allegiance Telecom | Cook | Landline | 01/25/1998 |
| (312) 255- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 256- | Chicago, IL | Allegiance Telecom | Cook | Landline | 01/25/1998 |
| (312) 258- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 259- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 260- | Chicago, IL | Mcimetro Access Transmission Services LLC | Cook | Landline | 04/01/1997 |
| (312) 261- | Chicago, IL | Broadwing Communications | Cook | Landline | 05/10/1999 |
| (312) 262- | Chicago, IL | Allegiance Telecom | Cook | Landline | 01/25/1998 |
| (312) 263- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 264- | Chicago, IL | Broadwing Communications | Cook | Landline | 07/22/1999 |
| (312) 265- | Chicago, IL | Access One | Cook | Landline | 06/01/2006 |
| (312) 266- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 267- | Chicago, IL | Ameritech Illinois | Cook | Landline | 06/13/2000 |
| (312) 268- | Chicago, IL | Broadwing Communications | Cook | Landline | 03/03/2001 |
| (312) 269- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 271- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 01/25/1998 |
| (312) 272- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 07/01/1996 |
| (312) 274- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 275- | Chicago, IL | Allegiance Telecom | Cook | Landline | 01/25/1998 |
| (312) 276- | Chicago, IL | Allegiance Telecom | Cook | Landline | 01/25/1998 |
| (312) 277- | Chicago, IL | Allegiance Telecom | Cook | Landline | 01/25/1998 |
| (312) 278- | Chicago, IL | Broadwing Communications | Cook | Landline | 10/31/2000 |
| (312) 279- | Chicago, IL | Mcimetro Access Transmission Services LLC | Cook | Landline | 01/25/1998 |
| (312) 280- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 281- | Chicago, IL | Global Crossing Local Services-il | Cook | Landline | 10/13/1999 |
| (312) 282- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 10/31/2000 |
| (312) 283- | Chicago, IL | Global Crossing Local Services-il | Cook | Landline | 10/13/1999 |
| (312) 284- | Chicago, IL | Xo Illinois | Cook | Landline | 06/30/2001 |
| (312) 285- | Chicago, IL | Sprint Spectrum L.p. | Cook | Cell Number | 06/30/2001 |
| (312) 286- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 06/13/2000 |
| (312) 287- | Chicago, IL | Nextel Communications | Cook | Cell Number | 10/31/2000 |
| (312) 288- | Chicago, IL | Mcimetro Access Transmission Services LLC | Cook | Landline | 01/25/1998 |
| (312) 289- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 290- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 291- | Chicago, IL | Ameritech Illinois | Cook | Landline | 06/13/2000 |
| (312) 293- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 294- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 295- | La Grange Park, IL | Usa Mobility Wireless | Cook | Cell Number | 02/11/1995 |
| (312) 296- | Chicago, IL | Nextel Communications | Cook | Cell Number | 01/14/2000 |
| (312) 297- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/11/1995 |
| (312) 298- | Chicago, IL | Sigecom | Cook | Landline | 07/22/1999 |
| (312) 299- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 300- | None, IL | Net Talk.com | Cook | Landline | 10/11/1997 |
| (312) 301- | Hinsdale, IL | New Cingular Wireless PCS | Du Page | Cell Number | 02/11/1995 |
| (312) 302- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 303- | Wheeling, IL | New Cingular Wireless PCS | Cook | Cell Number | 02/11/1995 |
| (312) 304- | Hinsdale, IL | New Cingular Wireless PCS | Du Page | Cell Number | 02/11/1995 |
| (312) 305- | Northbrook, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 306- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 307- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 308- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 309- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 310- | Northbrook, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 02/11/1995 |
| (312) 313- | None, IL | Cook | Cell Number | 11/11/2003 | |
| (312) 314- | Hinsdale, IL | New Cingular Wireless PCS | Du Page | Cell Number | 09/11/1994 |
| (312) 315- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 316- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 317- | Wheeling, IL | New Cingular Wireless PCS | Cook | Cell Number | 02/11/1995 |
| (312) 318- | La Grange Park, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 02/11/1995 |
| (312) 320- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 321- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 322- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 323- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 11/11/2003 |
| (312) 324- | Chicago, IL | Level 3 Communications | Cook | Landline | 10/31/2001 |
| (312) 325- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 326- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 327- | Chicago, IL | Xo Illinois | Cook | Landline | 08/20/2000 |
| (312) 328- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 329- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 330- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 331- | Wheeling, IL | New Cingular Wireless PCS | Cook | Cell Number | 01/10/1996 |
| (312) 332- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 333- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 11/11/2003 |
| (312) 334- | Chicago, IL | Globalcom-il | Cook | Landline | 10/31/2000 |
| (312) 335- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 336- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 337- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 338- | Chicago, IL | Ameritech Illinois | Cook | Landline | 04/01/1997 |
| (312) 339- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 341- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 342- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 06/30/2001 |
| (312) 343- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 344- | Chicago, IL | Ameritech Illinois | Cook | Landline | 07/06/1997 |
| (312) 345- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 346- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 347- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 348- | Chicago, IL | Neutral Tandem-illinois | Cook | Landline | 05/02/2004 |
| (312) 349- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 350- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 351- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 352- | Hinsdale, IL | New Cingular Wireless PCS | Du Page | Cell Number | 07/04/1995 |
| (312) 353- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 354- | Roselle, IL | New Cingular Wireless PCS | Du Page | Cell Number | 01/10/1996 |
| (312) 355- | Chicago, IL | Ameritech Illinois | Cook | Landline | 07/04/1995 |
| (312) 356- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/14/2000 |
| (312) 357- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 358- | None, IL | Cook | Cell Number | 07/04/1995 | |
| (312) 359- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 07/04/1995 |
| (312) 360- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 361- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/31/2000 |
| (312) 362- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 363- | Chicago, IL | Rcn Telecom Services Of Illinois | Cook | Landline | 05/10/1999 |
| (312) 364- | Chicago, IL | Ameritech Illinois | Cook | Landline | 09/11/1994 |
| (312) 365- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 366- | La Grange Park, IL | Usa Mobility Wireless | Cook | Cell Number | 01/10/1996 |
| (312) 367- | La Grange Park, IL | Usa Mobility Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 368- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 369- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 370- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 371- | Chicago, IL | Sprint Spectrum L.p. | Cook | Cell Number | 01/25/1998 |
| (312) 372- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 373- | Chicago, IL | Broadwing Communications | Cook | Landline | 05/10/1999 |
| (312) 374- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/13/1999 |
| (312) 375- | Chicago, IL | T-mobile Usa | Cook | Cell Number | 06/30/2001 |
| (312) 376- | Chicago, IL | Cbeyond Communications | Cook | Landline | 12/13/2004 |
| (312) 377- | Chicago, IL | Xo Illinois | Cook | Landline | 01/25/1998 |
| (312) 378- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 01/25/1998 |
| (312) 379- | Chicago, IL | Ovation Communications Of Illinois | Cook | Landline | 01/25/1998 |
| (312) 380- | Chicago, IL | Ameritech Illinois | Cook | Landline | 08/20/2000 |
| (312) 381- | Chicago, IL | Ameritech Illinois | Cook | Landline | 05/10/1999 |
| (312) 382- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 383- | None, IL | Cook | Cell Number | 01/10/1996 | |
| (312) 384- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/13/1999 |
| (312) 385- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 386- | Chicago, IL | Ameritech Illinois | Cook | Landline | 08/20/2000 |
| (312) 387- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 388- | Chicago, IL | United States Cellular Corp. - Illinois | Cook | Cell Number | 01/25/1998 |
| (312) 389- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 390- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 11/11/2003 |
| (312) 391- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 393- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 11/11/2003 |
| (312) 394- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 395- | Chicago, IL | AT&T Local | Cook | Landline | 01/25/1998 |
| (312) 396- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 397- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 398- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 01/10/1996 |
| (312) 399- | Chicago, IL | Sprint Spectrum L.p. | Cook | Cell Number | 07/22/1999 |
| (312) 400- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 11/11/2003 |
| (312) 401- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 402- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 403- | La Grange Park, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 02/11/1995 |
| (312) 404- | Chicago, IL | T-mobile Usa | Cook | Cell Number | 02/09/2003 |
| (312) 405- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 406- | Wheeling, IL | New Cingular Wireless PCS | Cook | Cell Number | 02/11/1995 |
| (312) 407- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 408- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 409- | Chicago, IL | Ameritech Illinois | Cook | Landline | 09/11/1994 |
| (312) 410- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 412- | Wheeling, IL | New Cingular Wireless PCS | Cook | Cell Number | 02/11/1995 |
| (312) 413- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 415- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 416- | Chicago, IL | Mci Worldcom Communications | Cook | Landline | 01/10/1996 |
| (312) 417- | Chicago, IL | Ameritech Illinois | Cook | Cell Number | 02/04/1994 |
| (312) 418- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 09/11/1994 |
| (312) 419- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 420- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 06/30/2001 |
| (312) 421- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 422- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 423- | Chicago, IL | Broadwing Communications | Cook | Landline | 11/11/2003 |
| (312) 424- | Chicago, IL | Ameritech Illinois | Cook | Landline | 09/11/1994 |
| (312) 425- | Chicago, IL | Ameritech Illinois | Cook | Landline | 07/01/1996 |
| (312) 426- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 01/10/1996 |
| (312) 427- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 428- | Chicago, IL | Level 3 Communications | Cook | Cell Number | 11/11/2003 |
| (312) 429- | Chicago, IL | Global Crossing Local Services-il | Cook | Landline | 10/13/1999 |
| (312) 430- | Chicago, IL | Ameritech Illinois | Cook | Landline | 05/02/2004 |
| (312) 431- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 432- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/11/1995 |
| (312) 433- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 434- | None, IL | Sprint Spectrum L.p. | Unknown | 07/08/2011 | |
| (312) 435- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 436- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/14/2000 |
| (312) 437- | Chicago, IL | United States Cellular Corp. - Illinois | Cook | Cell Number | 07/22/1999 |
| (312) 438- | None, IL | Cook | Cell Number | 11/11/2003 | |
| (312) 440- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 441- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 442- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 443- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 444- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 445- | Chicago, IL | Ameritech Illinois | Cook | Landline | 06/13/2000 |
| (312) 446- | Chicago, IL | Nextel Communications | Cook | Cell Number | 08/14/1998 |
| (312) 447- | Chicago, IL | Ameritech Illinois | Cook | Landline | 06/13/2000 |
| (312) 449- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 01/10/1996 |
| (312) 450- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 451- | Chicago, IL | T-mobile Usa | Cook | Landline | 01/25/1998 |
| (312) 452- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 11/11/2003 |
| (312) 453- | Chicago, IL | Mci Worldcom Communications | Cook | Landline | 01/10/1996 |
| (312) 454- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 455- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 456- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 457- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 04/01/1997 |
| (312) 458- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 460- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 461- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 462- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 463- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 464- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 465- | Chicago, IL | Us Xchange Of Illinois LLC DBA Choice One Comm Il | Cook | Landline | 06/30/2001 |
| (312) 466- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 467- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 469- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/31/2000 |
| (312) 470- | Chicago, IL | Mcimetro Access Transmission Services LLC | Cook | Landline | 01/10/1996 |
| (312) 472- | Chicago, IL | Ameritech Illinois | Cook | Landline | 06/01/2006 |
| (312) 473- | Chicago, IL | Ymax Communications Corp. | Unknown | 11/15/2006 | |
| (312) 474- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 475- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 476- | Chicago, IL | United States Cellular Corp. - Illinois | Cook | Landline | 08/20/2000 |
| (312) 477- | Chicago, IL | Halo Wireless, Inc | Unknown | 10/20/2010 | |
| (312) 478- | None, IL | Cook | Landline | 05/09/2003 | |
| (312) 479- | Chicago, IL | AT&T Local | Cook | Landline | 01/25/1998 |
| (312) 480- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 482- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 484- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 485- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 486- | Chicago, IL | Mci Worldcom Communications | Cook | Landline | 08/17/2004 |
| (312) 488- | Chicago, IL | Pg Telecom Of Illinois Inc. | Unknown | 01/18/2006 | |
| (312) 489- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 08/20/2000 |
| (312) 490- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 491- | Chicago, IL | Ameritech Illinois | Cook | Landline | 07/04/1995 |
| (312) 492- | Chicago, IL | Ameritech Illinois | Cook | Landline | 07/06/1997 |
| (312) 493- | Chicago, IL | T-mobile Usa | Cook | Cell Number | 06/30/2001 |
| (312) 494- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 495- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 496- | Chicago, IL | Ameritech Illinois | Cook | Landline | 07/01/1996 |
| (312) 497- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 498- | Chicago, IL | Sprint Spectrum L.p. | Cook | Cell Number | 07/22/1999 |
| (312) 499- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 501- | La Grange Park, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 02/11/1995 |
| (312) 502- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 503- | Chicago, IL | Broadwing Communications | Cook | Landline | 02/04/1994 |
| (312) 504- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 505- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 506- | Chicago, IL | Cimco Communications | Cook | Landline | 12/13/2004 |
| (312) 507- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 510- | Hinsdale, IL | New Cingular Wireless PCS | Du Page | Cell Number | 02/11/1995 |
| (312) 512- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 05/01/2002 |
| (312) 513- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 514- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 11/11/2003 |
| (312) 515- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 516- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/11/1995 |
| (312) 518- | Wheeling, IL | New Cingular Wireless PCS | Cook | Cell Number | 02/11/1995 |
| (312) 519- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 520- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 521- | Chicago, IL | AT&T Local | Cook | Landline | 01/25/1998 |
| (312) 523- | Chicago, IL | Sprint Spectrum L.p. | Cook | Cell Number | 06/30/2001 |
| (312) 524- | Wheeling, IL | New Cingular Wireless PCS | Cook | Cell Number | 02/11/1995 |
| (312) 525- | Chicago, IL | Mcimetro Access Transmission Services LLC | Cook | Landline | 08/04/2002 |
| (312) 526- | Chicago, IL | Ameritech Illinois | Cook | Landline | 07/04/1995 |
| (312) 527- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 528- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 529- | Chicago, IL | AT&T Local | Cook | Landline | 10/11/1997 |
| (312) 530- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 04/15/1996 |
| (312) 531- | Hinsdale, IL | New Cingular Wireless PCS | Du Page | Cell Number | 02/11/1995 |
| (312) 532- | Chicago, IL | T-mobile Usa | Cook | Cell Number | 11/11/2003 |
| (312) 533- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 10/13/1999 |
| (312) 534- | Chicago, IL | Ameritech Illinois | Unknown | 09/17/2008 | |
| (312) 537- | Chicago, IL | Ameritech Illinois | Cook | Landline | 04/15/1996 |
| (312) 540- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 541- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 542- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 543- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 04/01/1997 |
| (312) 544- | Chicago, IL | Ameritech Illinois | Cook | Landline | 06/13/2000 |
| (312) 545- | Chicago, IL | Sprint Spectrum L.p. | Cook | Cell Number | 03/03/2001 |
| (312) 546- | Chicago, IL | Level 3 Communications | Cook | Landline | 01/25/1998 |
| (312) 547- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 548- | Chicago, IL | Broadwing Communications | Unknown | 09/05/2007 | |
| (312) 550- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 551- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 552- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 553- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 554- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 556- | Chicago, IL | Ameritech Illinois | Cook | Cell Number | 11/11/2003 |
| (312) 557- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 558- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 559- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 560- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 562- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 563- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 564- | Chicago, IL | Cimco Communications | Unknown | 11/13/2006 | |
| (312) 565- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 566- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/10/1996 |
| (312) 567- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 568- | Chicago, IL | Ameritech Illinois | Cook | Landline | 06/13/2000 |
| (312) 569- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/31/2000 |
| (312) 570- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 571- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 572- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 573- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 574- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 575- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 576- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 577- | Chicago, IL | Mci Worldcom Communications | Cook | Landline | 01/11/1997 |
| (312) 578- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 580- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 582- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/25/2002 |
| (312) 583- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 587- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 588- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 589- | Chicago, IL | Ameritech Illinois | Cook | Landline | 03/03/2001 |
| (312) 590- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 591- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 592- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 593- | Chicago, IL | T-mobile Usa | Cook | Cell Number | 11/11/2003 |
| (312) 594- | Chicago, IL | Mcimetro Access Transmission Services LLC | Unknown | 11/06/2008 | |
| (312) 595- | Chicago, IL | Ameritech Illinois | Cook | Landline | 09/11/1994 |
| (312) 596- | Chicago, IL | Teleport Communications Group - Chicago | Cook | Landline | 07/01/1996 |
| (312) 597- | None, IL | Cook | Cell Number | 01/10/1996 | |
| (312) 599- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 01/10/1996 |
| (312) 601- | Chicago, IL | Mcimetro Access Transmission Services LLC | Cook | Landline | 04/01/1997 |
| (312) 602- | Chicago, IL | Broadwing Communications | Cook | Landline | 05/10/1999 |
| (312) 603- | Chicago, IL | Ameritech Illinois | Cook | Landline | 09/11/1994 |
| (312) 604- | Chicago, IL | Xo Illinois | Cook | Landline | 01/25/1998 |
| (312) 605- | None, IL | Cook | Cell Number | 01/10/1996 | |
| (312) 606- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 607- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 608- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 609- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 610- | None, IL | Cook | Cell Number | 10/15/1996 | |
| (312) 612- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/31/2000 |
| (312) 613- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 614- | None, IL | Cook | Cell Number | 09/11/1994 | |
| (312) 615- | Wheeling, IL | New Cingular Wireless PCS | Cook | Cell Number | 02/11/1995 |
| (312) 616- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 617- | Chicago, IL | Nextel Communications | Cook | Cell Number | 11/11/2003 |
| (312) 618- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 619- | None, IL | Cook | Cell Number | 04/01/1997 | |
| (312) 621- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 622- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 06/30/2001 |
| (312) 623- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 624- | Chicago, IL | Rcn Telecom Services Of Illinois | Cook | Landline | 05/10/1999 |
| (312) 625- | Chicago, IL | Global Naps | Cook | Landline | 05/01/2002 |
| (312) 626- | Chicago, IL | Infotelecom | Unknown | 02/04/2008 | |
| (312) 627- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 628- | Chicago, IL | Xo Illinois | Cook | Landline | 06/30/2001 |
| (312) 629- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 630- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 632- | Chicago, IL | Ameritech Illinois | Cook | Landline | 07/22/1999 |
| (312) 633- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 634- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 635- | Chicago, IL | Global Crossing Local Services-il | Cook | Landline | 11/11/2003 |
| (312) 636- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 637- | Chicago, IL | Broadwing Communications | Cook | Landline | 05/10/1999 |
| (312) 638- | Chicago, IL | Broadwing Communications | Cook | Landline | 01/25/1998 |
| (312) 639- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 640- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 641- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 642- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 643- | Chicago, IL | Rcn Telecom Services Of Illinois | Cook | Landline | 01/25/1998 |
| (312) 644- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 645- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 646- | Chicago, IL | Broadwing Communications | Unknown | 03/27/2007 | |
| (312) 647- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 10/15/1996 |
| (312) 648- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 649- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 650- | Chicago, IL | Rcn Telecom Services Of Illinois | Cook | Landline | 01/25/1998 |
| (312) 651- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 652- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 653- | Chicago, IL | Ameritech Illinois | Cook | Landline | 07/04/1995 |
| (312) 654- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 655- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 656- | Chicago, IL | Nextel Communications | Cook | Cell Number | 07/06/1997 |
| (312) 657- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 658- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 659- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 660- | Chicago, IL | Teleport Communications Group - Chicago | Cook | Landline | 01/25/1998 |
| (312) 661- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 662- | Chicago, IL | Ameritech Illinois | Cook | Landline | 08/20/2000 |
| (312) 663- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 664- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 665- | Chicago, IL | Teleport Communications Group - Chicago | Cook | Landline | 01/25/1998 |
| (312) 666- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 669- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 670- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 671- | Chicago, IL | United States Cellular Corp. - Illinois | Cook | Cell Number | 11/11/2003 |
| (312) 672- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 673- | Chicago, IL | Globalcom-il | Cook | Landline | 04/01/1997 |
| (312) 674- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 675- | Chicago, IL | Ameritech Illinois | Cook | Landline | 08/20/2000 |
| (312) 676- | Chicago, IL | Globalcom-il | Unknown | 06/16/2006 | |
| (312) 677- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 10/15/1996 |
| (312) 678- | None, IL | Cook | Cell Number | 07/06/1997 | |
| (312) 679- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 10/15/1996 |
| (312) 680- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 01/10/1996 |
| (312) 681- | Chicago, IL | Ameritech Illinois | Cook | Landline | 08/20/2000 |
| (312) 682- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 683- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 685- | Chicago, IL | United States Cellular Corp. - Illinois | Cook | Cell Number | 10/13/1999 |
| (312) 688- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 689- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 11/11/2003 |
| (312) 690- | None, IL | Cook | Cell Number | 05/01/2002 | |
| (312) 691- | Chicago, IL | Indiana Paging Ntwk | Cook | Cell Number | 04/01/1997 |
| (312) 692- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 693- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 694- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/31/2000 |
| (312) 695- | Chicago, IL | Ameritech Illinois | Cook | Landline | 05/10/1999 |
| (312) 696- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 697- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 698- | Chicago, IL | Broadwing Communications | Cook | Landline | 02/13/2002 |
| (312) 699- | Hinsdale, IL | New Cingular Wireless PCS | Du Page | Cell Number | 02/11/1995 |
| (312) 701- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 703- | Chicago, IL | Ameritech Illinois | Cook | Cell Number | 02/04/1994 |
| (312) 704- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 705- | Chicago, IL | Teleport Communications Group - Chicago | Cook | Landline | 02/04/1994 |
| (312) 706- | Chicago, IL | Teleport Communications Group - Chicago | Cook | Landline | 02/11/1995 |
| (312) 707- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 709- | None, IL | Cook | Cell Number | 07/04/1995 | |
| (312) 710- | Chicago, IL | Ameritech Illinois | Cook | Landline | 07/04/1995 |
| (312) 712- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 713- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 11/11/2003 |
| (312) 714- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/31/2000 |
| (312) 715- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 716- | Chicago, IL | Ameritech Illinois | Cook | Cell Number | 02/04/1994 |
| (312) 717- | La Grange Park, IL | Usa Mobility Wireless | Cook | Cell Number | 02/11/1995 |
| (312) 718- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 719- | Chicago, IL | United States Cellular Corp. - Illinois | Cook | Cell Number | 11/11/2003 |
| (312) 720- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 724- | None, IL | Cook | Cell Number | 07/01/1996 | |
| (312) 725- | Chicago, IL | Bandwidth.com Clec | Unknown | 10/08/2008 | |
| (312) 726- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 727- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 729- | Chicago, IL | Ameritech Illinois | Cook | Landline | 07/06/1997 |
| (312) 730- | Chicago, IL | AT&T Local | Cook | Landline | 01/25/1998 |
| (312) 731- | Chicago, IL | T-mobile Usa | Cook | Landline | 01/25/1998 |
| (312) 732- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 733- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 735- | Chicago, IL | Nextel Communications | Cook | Cell Number | 10/31/2001 |
| (312) 737- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 738- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 739- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 740- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 11/11/2003 |
| (312) 742- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/11/1995 |
| (312) 743- | Chicago, IL | Ameritech Illinois | Cook | Landline | 05/01/2002 |
| (312) 744- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 745- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 746- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 747- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 748- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 749- | Hinsdale, IL | New Cingular Wireless PCS | Du Page | Cell Number | 02/11/1995 |
| (312) 750- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 751- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 752- | Chicago, IL | Broadwing Communications | Cook | Landline | 08/04/2002 |
| (312) 753- | Chicago, IL | Rcn Telecom Services Of Illinois | Cook | Landline | 01/25/1998 |
| (312) 755- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 756- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/27/1999 |
| (312) 758- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 759- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 760- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 11/11/2003 |
| (312) 762- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/14/2000 |
| (312) 765- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 766- | None, IL | Cook | Cell Number | 10/15/1996 | |
| (312) 768- | Chicago, IL | AT&T Local | Cook | Landline | 01/25/1998 |
| (312) 769- | Chicago, IL | Indiana Paging Ntwk | Cook | Cell Number | 01/25/1998 |
| (312) 770- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 771- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 772- | Chicago, IL | Denali Spectrum License | Unknown | 08/18/2008 | |
| (312) 775- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/13/1999 |
| (312) 777- | Chicago, IL | Teleport Communications Group - Chicago | Cook | Landline | 01/25/1998 |
| (312) 780- | Chicago, IL | Mci Worldcom Communications | Cook | Landline | 01/11/1997 |
| (312) 781- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 782- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 784- | Chicago, IL | Globalcom-il | Unknown | 07/12/2007 | |
| (312) 785- | None, IL | Unknown | 07/24/2008 | ||
| (312) 786- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 787- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 788- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/31/2000 |
| (312) 789- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 790- | Chicago, IL | Ameritech Illinois | Cook | Cell Number | 02/04/1994 |
| (312) 791- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 793- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 794- | Chicago, IL | Rcn Telecom Services Of Illinois | Cook | Landline | 01/25/1998 |
| (312) 795- | Chicago, IL | Ameritech Illinois | Cook | Landline | 07/06/1997 |
| (312) 796- | None, IL | Cook | Landline | 11/11/2003 | |
| (312) 797- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 798- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/31/2000 |
| (312) 799- | Chicago, IL | Ameritech Illinois | Cook | Landline | 06/13/2000 |
| (312) 801- | None, IL | Cook | Cell Number | 07/04/1995 | |
| (312) 802- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 803- | Chicago, IL | Mci Worldcom Communications | Cook | Landline | 09/11/1994 |
| (312) 804- | Chicago, IL | T-mobile Usa | Cook | Cell Number | 08/04/2002 |
| (312) 805- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 806- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 807- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 808- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 810- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 812- | Chicago, IL | Ameritech Illinois | Cook | Cell Number | 02/04/1994 |
| (312) 813- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 814- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 816- | Hinsdale, IL | New Cingular Wireless PCS | Du Page | Cell Number | 02/11/1995 |
| (312) 817- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/11/1995 |
| (312) 818- | None, IL | Cook | Cell Number | 11/11/2003 | |
| (312) 819- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 820- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 821- | Chicago, IL | Mci Worldcom Communications | Cook | Landline | 01/25/1998 |
| (312) 822- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 823- | Chicago, IL | Ameritech Illinois | Cook | Landline | 09/11/1994 |
| (312) 824- | None, IL | Cook | Cell Number | 09/11/1994 | |
| (312) 825- | None, IL | Cook | Cell Number | 04/01/1997 | |
| (312) 826- | None, IL | Cook | Cell Number | 04/01/1997 | |
| (312) 827- | Chicago, IL | Ameritech Illinois | Cook | Landline | 09/11/1994 |
| (312) 828- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 829- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 830- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 831- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 832- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/10/1996 |
| (312) 833- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 834- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/31/2000 |
| (312) 835- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 836- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 837- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 839- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 11/11/2003 |
| (312) 840- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 841- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 842- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 844- | Hinsdale, IL | New Cingular Wireless PCS | Du Page | Cell Number | 02/11/1995 |
| (312) 845- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 846- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 848- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 849- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 850- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 851- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 852- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 853- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 854- | Chicago, IL | Rcn Telecom Services Of Illinois | Cook | Landline | 01/25/1998 |
| (312) 855- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 856- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 857- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 858- | None, IL | Unknown | 07/18/2008 | ||
| (312) 859- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 860- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 861- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 862- | Chicago, IL | Ameritech Illinois | Cook | Landline | 06/01/2006 |
| (312) 863- | Chicago, IL | Ovation Communications Of Illinois | Cook | Landline | 01/25/1998 |
| (312) 864- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/31/2000 |
| (312) 865- | Wheeling, IL | New Cingular Wireless PCS | Cook | Cell Number | 02/11/1995 |
| (312) 867- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/10/1996 |
| (312) 869- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/31/2000 |
| (312) 870- | Chicago, IL | Globalcom-il | Cook | Landline | 07/06/1997 |
| (312) 873- | Chicago, IL | Mci Worldcom Communications | Cook | Landline | 01/25/1998 |
| (312) 875- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 876- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 877- | None, IL | Cook | Cell Number | 02/04/1994 | |
| (312) 878- | Chicago, IL | Peerless Network Of Illinois | Unknown | 02/04/2008 | |
| (312) 879- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 880- | Chicago, IL | Ameritech Illinois | Cook | Landline | 03/03/2001 |
| (312) 881- | Chicago, IL | Ovation Communications Of Illinois | Cook | Landline | 01/25/1998 |
| (312) 882- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 884- | Chicago, IL | Ovation Communications Of Illinois | Cook | Landline | 01/25/1998 |
| (312) 886- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 887- | Chicago, IL | Ameritech Illinois | Cook | Landline | 07/22/1999 |
| (312) 888- | Chicago, IL | Geckotech | Unknown | 02/19/2009 | |
| (312) 890- | Chicago, IL | Sprint Spectrum L.p. | Cook | Cell Number | 03/03/2001 |
| (312) 891- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 892- | Chicago, IL | Broadwing Communications | Cook | Landline | 01/25/1998 |
| (312) 893- | Chicago, IL | Broadwing Communications | Cook | Landline | 01/25/1998 |
| (312) 894- | Chicago, IL | Mcimetro Access Transmission Services LLC | Cook | Landline | 01/25/1998 |
| (312) 895- | Chicago, IL | Broadwing Communications | Cook | Landline | 07/06/1997 |
| (312) 896- | Chicago, IL | Broadwing Communications | Cook | Landline | 11/20/1998 |
| (312) 897- | None, IL | Cook | Cell Number | 02/11/1995 | |
| (312) 898- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 899- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 901- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 902- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 903- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 11/11/2003 |
| (312) 904- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 905- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 906- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 907- | Chicago, IL | Nextel Communications | Cook | Cell Number | 01/25/1998 |
| (312) 908- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 909- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 910- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 912- | Chicago, IL | Ameritech Illinois | Cook | Landline | 09/11/1994 |
| (312) 913- | Chicago, IL | Ameritech Illinois | Cook | Landline | 10/11/1997 |
| (312) 914- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 915- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 916- | Chicago, IL | American Messaging (am) | Cook | Cell Number | 01/11/1997 |
| (312) 917- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 919- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 920- | Chicago, IL | Ameritech Illinois | Cook | Landline | 11/11/2003 |
| (312) 921- | Chicago, IL | Ameritech Illinois | Unknown | 07/21/2008 | |
| (312) 922- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 923- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 924- | Chicago, IL | Paetec Communications | Cook | Landline | 03/03/2001 |
| (312) 925- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 01/25/1998 |
| (312) 926- | Chicago, IL | Ameritech Illinois | Cook | Landline | 04/01/1997 |
| (312) 927- | Chicago, IL | T-mobile Usa | Cook | Cell Number | 02/09/2003 |
| (312) 928- | Chicago, IL | Ameritech Illinois | Cook | Landline | 04/01/1997 |
| (312) 929- | Chicago, IL | T-mobile Usa | Unknown | 04/27/2006 | |
| (312) 930- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 931- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 932- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 933- | Chicago, IL | Sprint Spectrum L.p. | Cook | Cell Number | 01/25/1998 |
| (312) 934- | None, IL | Cook | Cell Number | 02/04/1994 | |
| (312) 935- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 936- | Chicago, IL | Ameritech Illinois | Cook | Cell Number | 02/04/1994 |
| (312) 937- | None, IL | Cook | Cell Number | 02/04/1994 | |
| (312) 938- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 939- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 940- | None, IL | Cook | Cell Number | 10/15/1996 | |
| (312) 941- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 942- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 943- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 944- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 945- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 946- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 947- | Chicago, IL | Ameritech Illinois | Unknown | 11/18/2010 | |
| (312) 948- | Chicago, IL | Ovation Communications Of Illinois | Cook | Landline | 02/27/1999 |
| (312) 949- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 951- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 952- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 10/15/1996 |
| (312) 953- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 04/01/1997 |
| (312) 954- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 955- | Chicago, IL | Rcn Telecom Services Of Illinois | Cook | Landline | 01/25/1998 |
| (312) 956- | None, IL | Cook | Cell Number | 02/11/1995 | |
| (312) 957- | Chicago, IL | Ameritech Illinois | Cook | Landline | 09/11/1994 |
| (312) 960- | Chicago, IL | Ameritech Illinois | Cook | Landline | 07/06/1997 |
| (312) 961- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 01/25/1998 |
| (312) 962- | Chicago, IL | Global Crossing Local Services-il | Cook | Landline | 01/25/1998 |
| (312) 963- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/11/1995 |
| (312) 964- | None, IL | Cook | Cell Number | 07/06/1997 | |
| (312) 965- | Chicago, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 11/11/2003 |
| (312) 968- | La Grange Park, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 02/11/1995 |
| (312) 969- | La Grange Park, IL | Cellco Partnership DBA Verizon Wireless | Cook | Cell Number | 02/11/1995 |
| (312) 970- | Chicago, IL | Ameritech Illinois | Cook | Landline | 03/03/2001 |
| (312) 971- | None, IL | Cook | Cell Number | 04/01/1997 | |
| (312) 972- | Chicago, IL | New Cingular Wireless PCS | Cook | Cell Number | 11/11/2003 |
| (312) 974- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 977- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 979- | Chicago, IL | Ameritech Illinois | Cook | Cell Number | 02/04/1994 |
| (312) 980- | Chicago, IL | Teleport Communications Group - Chicago | Cook | Landline | 04/01/1997 |
| (312) 981- | Chicago, IL | Ovation Communications Of Illinois | Cook | Landline | 02/27/1999 |
| (312) 982- | Chicago, IL | Usa Mobility Wireless | Cook | Cell Number | 02/04/1994 |
| (312) 983- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 984- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 985- | Chicago, IL | Ovation Communications Of Illinois | Cook | Landline | 02/27/1999 |
| (312) 986- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 987- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 988- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 990- | Hinsdale, IL | New Cingular Wireless PCS | Du Page | Cell Number | 02/11/1995 |
| (312) 991- | Wheeling, IL | New Cingular Wireless PCS | Cook | Cell Number | 02/11/1995 |
| (312) 992- | Chicago, IL | Ameritech Illinois | Cook | Landline | 01/25/1998 |
| (312) 993- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 994- | Chicago, IL | Ovation Communications Of Illinois | Cook | Landline | 01/25/1998 |
| (312) 996- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 997- | Chicago, IL | Ameritech Illinois | Cook | Landline | 02/04/1994 |
| (312) 998- | None, IL | Cook | Cell Number | 10/15/1996 | |
| (312) 999- | Chicago, IL | Cygnus Telecommunications Corporation | Unknown | 08/20/2010 |
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