240 Area Code

Area Code 240 Details

StateMaryland
USA
CapitalAnnapolis
Short URLhttp://thecallphone.com/240

Area Code 240 Prefixes

PrefixPrimary CityCompanyCountyUsageIntroduced
(240) 200-Mount Rainier, MDBandwidth.com ClecUnknown10/04/2010
(240) 201-Ridge, MDGlobal Naps SouthSaint Mary'sLandline07/22/1999
(240) 205-Rockville, MDNew Cingular Wireless PCS - DCMontgomeryCell Number01/27/2004
(240) 206-Glenn Dale, MDXo MarylandPrince George'sLandline10/31/2001
(240) 207-Damascus, MDCavalier East LLCMontgomeryLandline08/20/2000
(240) 208-La Plata, MDGlobal Naps SouthCharlesLandline07/22/1999
(240) 209-Indian Head, MDGlobal Naps SouthCharlesLandline07/22/1999
(240) 210-Waldorf, MDNew Cingular Wireless PCS - DCCharlesCell Number08/20/2000
(240) 212-Oakland, MDCore CommunicationsGarrettLandline06/13/2000
(240) 213-Waldorf, MDGlobal Naps SouthCharlesLandline07/22/1999
(240) 214-Mechanicsville, MDGlobal Naps SouthSaint Mary'sLandline07/22/1999
(240) 215-Frederick, MDTelcove OperationsFrederickLandline01/14/2000
(240) 216-Waldorf, MDNextel CommunicationsCharlesCell Number06/30/2001
(240) 217-Hagerstown, MDOmnipoint Communications Cap OperationsWashingtonCell Number06/30/2001
(240) 218-Nanjemoy, MDGlobal Naps SouthCharlesLandline02/27/1999
(240) 219-Newburg, MDGlobal Naps SouthCharlesLandline07/22/1999
(240) 220-Poolesville, MDGlobal Naps SouthMontgomeryLandline02/27/1999
(240) 221-Rockville, MDVerizon MarylandMontgomeryLandline05/10/1999
(240) 222-Waldorf, MDCavalier Telephone Mid-atlanticCharlesLandline08/20/2000
(240) 223-Mount Rainier, MDAllegiance TelecomPrince George'sLandline02/27/1999
(240) 224-None, MDPrince George'sCell Number10/13/1999
(240) 225-Frederick, MDCore CommunicationsFrederickLandline06/13/2000
(240) 228-Laurel, MDVerizon MarylandPrince George'sLandline11/20/1998
(240) 229-Waldorf, MDBroadwing Communications. LLCCharlesLandline07/22/1999
(240) 230-Hughesville, MDGlobal Crossing Local Services-mdCharlesLandline05/10/1999
(240) 231-Hagerstown, MDCore CommunicationsWashingtonLandline06/13/2000
(240) 232-Mount Rainier, MDBroadwing Communications. LLCPrince George'sLandline07/22/1999
(240) 233-Newburg, MDTeleport Communications Group - DCCharlesLandline02/27/1999
(240) 234-None, MDMontgomeryCell Number05/10/1999
(240) 235-Bethesda, MDPaetec CommunicationsMontgomeryLandline10/13/1999
(240) 236-Frederick, MDVerizon MarylandFrederickLandline06/13/2000
(240) 237-Callaway, MDTeleport Communications Group - DCSaint Mary'sLandline02/27/1999
(240) 238-Rockville, MDPaetec CommunicationsMontgomeryLandline10/13/1999
(240) 239-Leonardtown, MDCore CommunicationsSaint Mary'sLandline10/31/2000
(240) 241-Chevy Chase, MDStarpower CommunicationsPrince George'sLandline02/27/1999
(240) 242-Kensington, MDStarpower CommunicationsMontgomeryLandline02/27/1999
(240) 243-Gaithersburg, MDAllegiance TelecomMontgomeryLandline01/14/2000
(240) 244-Mount Rainier, MDStarpower CommunicationsPrince George'sLandline02/27/1999
(240) 245-Glenn Dale, MDStarpower CommunicationsPrince George'sLandline02/27/1999
(240) 246-Gaithersburg, MDStarpower CommunicationsMontgomeryLandline11/20/1998
(240) 247-Mount Rainier, MDAllegiance TelecomPrince George'sLandline02/27/1999
(240) 248-Ridge, MDGlobal Naps SouthSaint Mary'sLandline02/27/1999
(240) 249-Mechanicsville, MDTeleport Communications Group - DCSaint Mary'sLandline02/27/1999
(240) 250-Brandywine, MDGlobal Naps SouthPrince George'sLandline02/27/1999
(240) 251-Highfield, MDCore CommunicationsWashingtonLandline06/13/2000
(240) 252-Gaithersburg, MDLevel 3 CommunicationsMontgomeryLandline05/10/1999
(240) 253-Mount Rainier, MDGlobal Crossing Local Services-mdPrince George'sLandline02/27/1999
(240) 254-Hughesville, MDTeleport Communications Group - DCCharlesLandline02/27/1999
(240) 255-Poolesville, MDGlobal Naps SouthMontgomeryLandline07/22/1999
(240) 256-Leonardtown, MDTeleport Communications Group - DCSaint Mary'sLandline02/27/1999
(240) 257-Nanjemoy, MDTeleport Communications Group - DCCharlesLandline02/27/1999
(240) 258-Ridge, MDTeleport Communications Group - DCSaint Mary'sLandline02/27/1999
(240) 260-Mount Rainier, MDAllegiance TelecomPrince George'sLandline06/13/2000
(240) 261-Rockville, MDGlobal Naps SouthMontgomeryLandline02/27/1999
(240) 262-Damascus, MDTidalwave Telephone Inc.MontgomeryLandline10/13/1999
(240) 263-Damascus, MDTidalwave Telephone Inc.MontgomeryLandline10/13/1999
(240) 264-Beltsville, MDVerizon MarylandPrince George'sLandline02/27/1999
(240) 265-Capitol Heights, MDTidalwave Telephone Inc.Prince George'sLandline10/13/1999
(240) 266-Glenn Dale, MDGlobal Naps SouthPrince George'sLandline02/27/1999
(240) 267-Capitol Heights, MDTidalwave Telephone Inc.Prince George'sLandline10/13/1999
(240) 268-Rockville, MDAllegiance TelecomPrince George'sLandline02/27/1999
(240) 269-Clinton, MDGlobal Naps SouthPrince George'sLandline02/27/1999
(240) 270-Glenn Dale, MDTidalwave Telephone Inc.Prince George'sLandline10/13/1999
(240) 271-Bethesda, MDNew Cingular Wireless PCS - DCMontgomeryCell Number02/27/1999
(240) 272-Glenn Dale, MDTidalwave Telephone Inc.Prince George'sLandline10/13/1999
(240) 273-Mount Rainier, MDBroadwing Communications. LLCPrince George'sLandline07/22/1999
(240) 274-Bethesda, MDNew Cingular Wireless PCS - DCMontgomeryCell Number02/27/1999
(240) 275-Grantsville, MDCore CommunicationsGarrettLandline10/31/2000
(240) 276-Rockville, MDVerizon MarylandMontgomeryLandline12/13/2004
(240) 277-Bethesda, MDSprint Spectrum L.p.MontgomeryCell Number02/09/2003
(240) 278-None, MDCellco Partnership DBA Verizon WirelessUnknown07/08/2011
(240) 279-Waldorf, MDCore CommunicationsCharlesLandline10/31/2000
(240) 280-Laurel, MDComcast Phone Of Northern MarylandAnne ArundelLandline03/03/2001
(240) 281-Bethesda, MDNew Cingular Wireless PCS - DCMontgomeryCell Number10/13/1999
(240) 282-Mechanicsville, MDGlobal Naps SouthSaint Mary'sLandline02/27/1999
(240) 283-Kensington, MDPaetec CommunicationsMontgomeryLandline10/13/1999
(240) 284-Frostburg, MDNationslineAlleganyLandline03/27/2005
(240) 285-Frederick, MDCellco Partnership DBA Verizon WirelessFrederickLandline06/13/2000
(240) 286-Bethesda, MDNextel CommunicationsMontgomeryCell Number02/09/2003
(240) 287-Hancock, MDCore CommunicationsWashingtonLandline06/13/2000
(240) 288-Thurmont, MDNationslineFrederickLandline03/27/2005
(240) 289-Oxon Hill, MDCavalier Telephone Mid-atlanticPrince George'sLandline08/20/2000
(240) 290-Mount Rainier, MDAllegiance TelecomPrince George'sLandline02/27/1999
(240) 291-Hagerstown, MDNew Cingular Wireless PCS - DCWashingtonCell Number02/09/2003
(240) 292-Kensington, MDVerizon MarylandMontgomeryLandline10/13/1999
(240) 293-Silver Spring, MDStarpower CommunicationsMontgomeryLandline02/27/1999
(240) 294-Laurel, MDXo MarylandPrince George'sLandline06/30/2001
(240) 295-Laurel, MDCavalier Telephone Mid-atlanticPrince George'sLandline08/20/2000
(240) 296-Hyattsville, MDCavalier Telephone Mid-atlanticPrince George'sLandline08/20/2000
(240) 297-College Park, MDLevel 3 CommunicationsPrince George'sLandline10/13/1999
(240) 298-Leonardtown, MDCellco Partnership DBA Verizon WirelessSaint Mary'sCell Number10/13/1999
(240) 299-Waldorf, MDNextel CommunicationsCharlesCell Number10/13/1999
(240) 300-Waldorf, MDCellco Partnership DBA Verizon WirelessUnknown12/07/2010
(240) 303-Clinton, MDCavalier Telephone Mid-atlanticPrince George'sLandline08/20/2000
(240) 304-Mount Rainier, MDNextel CommunicationsPrince George'sCell Number02/09/2003
(240) 305-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number02/27/1999
(240) 306-Gaithersburg, MDAllegiance TelecomMontgomeryLandline06/13/2000
(240) 307-Emmitsburg, MDAT&T LocalFrederickLandline08/31/2003
(240) 308-Damascus, MDNew Cingular Wireless PCS - DCMontgomeryCell Number08/20/2000
(240) 310-Hagerstown, MDUscoc Of Cumberland DBA United States Cel MdWashingtonCell Number02/27/1999
(240) 312-Capitol Heights, MDCavalier Telephone Mid-atlanticPrince George'sLandline08/20/2000
(240) 313-Hagerstown, MDVerizon MarylandWashingtonLandline10/31/2000
(240) 314-Rockville, MDVerizon MarylandMontgomeryLandline06/13/2000
(240) 315-Frederick, MDVerizon MarylandFrederickLandline08/20/2000
(240) 316-Chevy Chase, MDSprint Spectrum L.p.UnknownNone
(240) 317-Callaway, MDStarpower CommunicationsSaint Mary'sLandline11/20/1998
(240) 318-Clinton, MDVerizon MarylandPrince George'sLandline01/14/2000
(240) 319-Columbia, MDCellco Partnership DBA Verizon WirelessUnknown06/06/2008
(240) 320-Waldorf, MDCavalier East LLCCharlesLandline10/31/2000
(240) 321-Oakland, MDUscoc Of Cumberland DBA United States Cel MdGarrettCell Number02/27/1999
(240) 322-Mccoole, MDCore CommunicationsAlleganyLandline10/31/2000
(240) 323-Emmitsburg, MDCore CommunicationsFrederickLandline10/31/2000
(240) 324-Clarksville, MDYmax Communications Corp.Unknown10/08/2008
(240) 325-Damascus, MDCore CommunicationsMontgomeryLandline10/31/2000
(240) 326-Upper Marlboro, MDCavalier Telephone Mid-atlanticPrince George'sLandline08/20/2000
(240) 327-Gaithersburg, MDCore CommunicationsMontgomeryLandline10/31/2000
(240) 328-Rockville, MDVerizon MarylandMontgomeryLandline08/20/2000
(240) 329-Hagerstown, MDLevel 3 CommunicationsWashingtonLandline10/31/2000
(240) 330-Cabin John, MDSprint Spectrum L.p.Unknown12/14/2007
(240) 331-Silver Spring, MDGlobal Naps SouthMontgomeryLandline02/27/1999
(240) 332-Newburg, MDGlobal Naps SouthCharlesLandline02/27/1999
(240) 333-Mount Rainier, MDCavalier East LLCMontgomeryLandline07/22/1999
(240) 334-Mount Rainier, MDGlobal Crossing Local Services-mdPrince George'sLandline02/27/1999
(240) 335-Glenn Dale, MDCavalier Telephone Mid-atlanticPrince George'sLandline08/20/2000
(240) 336-Bethesda, MDCore CommunicationsMontgomeryLandline10/31/2000
(240) 337-Capitol Heights, MDGlobal Naps SouthPrince George'sLandline02/27/1999
(240) 338-Silver Spring, MDCellco Partnership DBA Verizon WirelessMontgomeryCell Number01/14/2000
(240) 339-Upper Marlboro, MDCavalier East LLCPrince George'sLandline10/31/2000
(240) 341-Adamstown, MDMci Worldcom CommunicationsUnknown10/27/2008
(240) 342-Sandy Spring, MDStarpower CommunicationsMontgomeryLandline11/20/1998
(240) 343-None, MDCellco Partnership DBA Verizon WirelessUnknown05/10/2011
(240) 344-Frederick, MDNew Cingular Wireless PCS - DCFrederickCell Number02/09/2003
(240) 345-Sandy Spring, MDLevel 3 CommunicationsUnknown03/09/2006
(240) 346-Waldorf, MDSprint Spectrum L.p.CharlesCell Number08/20/2000
(240) 347-Hagerstown, MDBandwidth.com ClecUnknown08/04/2008
(240) 348-Clinton, MDLevel 3 CommunicationsPrince George'sLandline08/20/2000
(240) 349-La Plata, MDGlobal Crossing Local Services-mdCharlesLandline05/10/1999
(240) 350-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number05/10/1999
(240) 351-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number05/10/1999
(240) 352-La Plata, MDGlobal Naps SouthCharlesLandline02/27/1999
(240) 353-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number05/10/1999
(240) 354-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number05/10/1999
(240) 355-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number05/10/1999
(240) 356-Frederick, MDLevel 3 CommunicationsFrederickLandline03/03/2001
(240) 357-Frederick, MDCellco Partnership DBA Verizon WirelessUnknown06/12/2006
(240) 358-Damascus, MDGlobal Naps SouthMontgomeryLandline02/27/1999
(240) 359-Indian Head, MDGlobal Naps SouthCharlesLandline02/27/1999
(240) 361-Gaithersburg, MDCavalier Telephone Mid-atlanticMontgomeryLandline08/20/2000
(240) 362-Cumberland, MDVerizon MarylandAlleganyLandline02/27/1999
(240) 363-Kensington, MDGlobal Naps SouthMontgomeryLandline02/27/1999
(240) 364-Gaithersburg, MDCavalier East LLCMontgomeryLandline10/13/1999
(240) 365-Damascus, MDBaltimore-washington Telephone BwtMontgomeryLandline08/20/2000
(240) 366-Williamsport, MDAT&T LocalWashingtonLandline03/03/2001
(240) 367-Frederick, MDNextel CommunicationsFrederickCell Number02/09/2003
(240) 368-Waldorf, MDGlobal Naps SouthCharlesLandline02/27/1999
(240) 369-Mount Airy, MDCore CommunicationsFrederickLandline10/31/2000
(240) 370-Bethesda, MDSprint Spectrum L.p.Unknown12/14/2007
(240) 371-Silver Spring, MDGlobal Naps SouthMontgomeryLandline02/27/1999
(240) 372-Gaithersburg, MDNextel CommunicationsMontgomeryCell Number10/13/1999
(240) 373-Odenton, MDVerizon MarylandAnne ArundelLandline11/20/1998
(240) 374-Laurel, MDGlobal Crossing Local Services-mdPrince George'sLandline02/27/1999
(240) 375-Capitol Heights, MDNextel CommunicationsPrince George'sCell Number11/20/1998
(240) 376-Hughesville, MDGlobal Naps SouthCharlesLandline02/27/1999
(240) 377-Indian Head, MDGlobal Crossing Local Services-mdCharlesLandline05/10/1999
(240) 378-Cumberland, MDCore CommunicationsAlleganyLandline10/31/2000
(240) 379-Frederick, MDVerizon MarylandFrederickLandline03/03/2001
(240) 380-Cabin John, MDCellco Partnership DBA Verizon WirelessUnknown09/17/2007
(240) 381-Silver Spring, MDNew Cingular Wireless PCS - DCMontgomeryCell Number01/14/2000
(240) 382-Hagerstown, MDTeleport Communications Group AmericaUnknown06/11/2009
(240) 383-Chevy Chase, MDNew Cingular Wireless PCS - DCMontgomeryCell Number08/20/2000
(240) 384-Callaway, MDGlobal Naps SouthSaint Mary'sLandline02/27/1999
(240) 385-Myersville, MDVerizon MarylandFrederickLandline10/31/2000
(240) 386-Gaithersburg, MDVerizon MarylandMontgomeryLandline08/20/2000
(240) 387-Chevy Chase, MDCavalier East LLCPrince George'sLandline01/14/2000
(240) 388-Gaithersburg, MDNextel CommunicationsMontgomeryCell Number05/09/2003
(240) 389-Sandy Spring, MDAtx Telecommunications Services, LtdMontgomeryLandline06/30/2001
(240) 390-Sandy Spring, MDCavalier Telephone Mid-atlanticMontgomeryLandline08/20/2000
(240) 391-Mount Rainier, MDGlobal Crossing Local Services-mdPrince George'sLandline02/27/1999
(240) 392-Capitol Heights, MDStarpower CommunicationsPrince George'sLandline02/27/1999
(240) 393-Silver Spring, MDCellco Partnership DBA Verizon WirelessMontgomeryCell Number06/13/2000
(240) 394-Mount Airy, MDNew Cingular Wireless PCS - DCFrederickCell Number03/27/2005
(240) 395-Bethesda, MDCavalier Telephone Mid-atlanticMontgomeryLandline08/20/2000
(240) 396-Mount Rainier, MDGlobal Crossing Local Services-mdMontgomeryLandline02/27/1999
(240) 397-Frederick, MDCellco Partnership DBA Verizon WirelessUnknown03/06/2009
(240) 398-Silver Spring, MDNextel CommunicationsMontgomeryCell Number02/09/2003
(240) 399-Chevy Chase, MDXo MarylandMontgomeryLandline10/13/1999
(240) 401-Rockville, MDNew Cingular Wireless PCS - DCMontgomeryCell Number11/20/1998
(240) 402-College Park, MDMci Worldcom CommunicationsUnknown09/21/2010
(240) 403-Rockville, MDCavalier Telephone Mid-atlanticMontgomeryLandline08/20/2000
(240) 404-Gaithersburg, MDXo MarylandMontgomeryLandline06/30/2001
(240) 405-Frederick, MDUs Lec Of MarylandFrederickLandline03/27/2005
(240) 406-Rockville, MDLeap Wireless Intl DBA Cricket CommUnknown09/17/2009
(240) 407-Mount Rainier, MDGlobal Crossing Local Services-mdPrince George'sLandline02/27/1999
(240) 408-Rockville, MDLeap Wireless Intl DBA Cricket CommUnknown10/14/2009
(240) 409-Frederick, MDNew Cingular Wireless PCS - DCFrederickCell Number02/27/1999
(240) 412-Waldorf, MDSprint Spectrum L.p.CharlesCell Number06/30/2001
(240) 413-Hyattsville, MDOmnipoint Communications Cap OperationsPrince George'sCell Number06/30/2001
(240) 414-Oxon Hill, MDGlobal Naps SouthPrince George'sLandline02/27/1999
(240) 415-Frederick, MDYmax Communications Corp.Unknown12/16/2008
(240) 416-Waldorf, MDNew Cingular Wireless PCS - DCCharlesCell Number10/31/2001
(240) 417-Capitol Heights, MDNextel CommunicationsPrince George'sCell Number03/03/2001
(240) 418-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number05/01/2002
(240) 419-Waldorf, MDCellco Partnership DBA Verizon WirelessUnknown10/29/2007
(240) 420-Hagerstown, MDVerizon MarylandWashingtonLandline07/22/1999
(240) 421-Rockville, MDOmnipoint Communications Cap OperationsMontgomeryCell Number10/31/2000
(240) 422-Frederick, MDOmnipoint Communications Cap OperationsFrederickCell Number10/25/2002
(240) 423-Silver Spring, MDOmnipoint Communications Cap OperationsMontgomeryCell Number10/31/2001
(240) 424-Mount Rainier, MDSprint Spectrum L.p.Unknown11/16/2007
(240) 425-Cabin John, MDDslnet Communications VaMontgomeryLandline06/30/2001
(240) 426-Bethesda, MDSprint Spectrum L.p.MontgomeryCell Number02/13/2002
(240) 427-Waldorf, MDXo MarylandCharlesLandline10/31/2001
(240) 428-Rockville, MDBandwidth.com ClecUnknown10/14/2009
(240) 429-Silver Spring, MDCellco Partnership DBA Verizon WirelessUnknown12/19/2006
(240) 430-Kensington, MDCavalier Telephone Mid-atlanticMontgomeryLandline08/20/2000
(240) 431-Tall Timbers, MDSprint Spectrum L.p.Saint Mary'sCell Number10/31/2000
(240) 432-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number02/27/1999
(240) 433-Silver Spring, MDCavalier Telephone Mid-atlanticMontgomeryLandline08/20/2000
(240) 434-Leonardtown, MDBroadwing Communications. LLCSaint Mary'sLandline10/31/2000
(240) 435-Waldorf, MDCellco Partnership DBA Verizon WirelessUnknown05/07/2009
(240) 436-Ijamsville, MDTelcove OperationsFrederickLandline08/20/2000
(240) 437-Sandy Spring, MDXo MarylandMontgomeryLandline06/30/2001
(240) 439-Frederick, MDCellco Partnership DBA Verizon WirelessUnknown06/06/2008
(240) 440-Frederick, MDLeap Wireless Intl DBA Cricket CommUnknown02/27/2009
(240) 441-Oxon Hill, MDOmnipoint Communications Cap OperationsPrince George'sCell Number10/31/2001
(240) 442-Oakland, MDVerizon MarylandGarrettLandline10/31/2001
(240) 446-Frederick, MDCellco Partnership DBA Verizon WirelessFrederickCell Number02/13/2002
(240) 447-Rockville, MDNew Cingular Wireless PCS - DCMontgomeryCell Number02/27/1999
(240) 449-Gaithersburg, MDNew Cingular Wireless PCS - DCMontgomeryCell Number03/03/2001
(240) 450-Silver Spring, MDCavalier Telephone Mid-atlanticMontgomeryLandline08/20/2000
(240) 452-Hagerstown, MDNtelos Network Inc.-vaUnknown07/22/2010
(240) 453-Rockville, MDVerizon MarylandMontgomeryLandline11/20/1998
(240) 454-Gaithersburg, MDPaetec CommunicationsMontgomeryCell Number10/13/2005
(240) 455-Capitol Heights, MDPaetec CommunicationsPrince George'sLandline10/31/2001
(240) 456-Laurel, MDVerizon MarylandPrince George'sLandline08/20/2000
(240) 457-Frederick, MDCellco Partnership DBA Verizon WirelessUnknown09/04/2008
(240) 459-Laurel, MDCellco Partnership DBA Verizon WirelessUnknown07/27/2010
(240) 460-Silver Spring, MDNew Cingular Wireless PCS - DCMontgomeryCell Number07/22/1999
(240) 461-Silver Spring, MDNew Cingular Wireless PCS - DCMontgomeryCell Number07/22/1999
(240) 462-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number02/27/1999
(240) 463-Silver Spring, MDNew Cingular Wireless PCS - DCMontgomeryCell Number02/27/1999
(240) 464-Chevy Chase, MDNextel CommunicationsMontgomeryLandline05/10/1999
(240) 465-Bethesda, MDGlobal Naps SouthMontgomeryLandline02/27/1999
(240) 466-Mechanicsville, MDGlobal Naps SouthSaint Mary'sLandline10/31/2001
(240) 468-Mount Rainier, MDSprint Spectrum L.p.Unknown11/16/2007
(240) 469-Hagerstown, MDSprint Spectrum L.p.Unknown02/14/2008
(240) 471-Silver Spring, MDGlobal Crossing Local Services-mdMontgomeryLandline02/27/1999
(240) 472-Silver Spring, MDNew Cingular Wireless PCS - DCMontgomeryCell Number08/20/2000
(240) 473-College Park, MDCavalier Telephone Mid-atlanticPrince George'sLandline08/20/2000
(240) 475-Silver Spring, MDNew Cingular Wireless PCS - DCMontgomeryCell Number08/20/2000
(240) 476-Silver Spring, MDOmnipoint Communications Cap OperationsMontgomeryCell Number06/30/2001
(240) 477-Gaithersburg, MDLightwave CommunicationsMontgomeryLandline10/13/2005
(240) 478-Silver Spring, MDNew Cingular Wireless PCS - DCMontgomeryCell Number03/27/2005
(240) 479-Oxon Hill, MDCellco Partnership DBA Verizon WirelessUnknown04/07/2008
(240) 480-Bethesda, MDSprint Spectrum L.p.Unknown09/27/2010
(240) 481-Silver Spring, MDOmnipoint Communications Cap OperationsMontgomeryCell Number10/31/2001
(240) 482-Bethesda, MDUs Lec Of MarylandMontgomeryLandline01/14/2000
(240) 483-Bethesda, MDComcast Phone Of Northern MarylandMontgomeryLandline10/31/2001
(240) 485-Cabin John, MDUs Lec Of MarylandMontgomeryLandline01/14/2000
(240) 486-Glenn Dale, MDOmnipoint Communications Cap OperationsPrince George'sCell Number06/30/2001
(240) 487-Hyattsville, MDUs Lec Of MarylandPrince George'sLandline01/14/2000
(240) 489-Poolesville, MDXo MarylandMontgomeryLandline06/30/2001
(240) 490-Middletown, MDOmnipoint Communications Cap OperationsFrederickCell Number10/31/2001
(240) 491-Mount Rainier, MDGlobal Crossing Local Services-mdMontgomeryCell Number02/27/1999
(240) 492-Capitol Heights, MDUs Lec Of MarylandPrince George'sLandline01/14/2000
(240) 493-Oxon Hill, MDUs Lec Of MarylandPrince George'sLandline01/14/2000
(240) 494-Mount Rainier, MDCavalier East LLCMontgomeryLandline07/22/1999
(240) 497-Chevy Chase, MDVerizon MarylandMontgomeryLandline10/31/2000
(240) 498-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number10/31/2000
(240) 499-Cabin John, MDUs Lec Of MarylandMontgomeryLandline01/14/2000
(240) 500-Hagerstown, MDUs Lec Of MarylandUnknown10/21/2010
(240) 501-Silver Spring, MDSprint Spectrum L.p.MontgomeryCell Number02/13/2002
(240) 505-Silver Spring, MDOmnipoint Communications Cap OperationsMontgomeryCell Number05/01/2002
(240) 506-Rockville, MDNew Cingular Wireless PCS - DCMontgomeryCell Number05/01/2002
(240) 507-Cabin John, MDCellco Partnership DBA Verizon WirelessUnknown09/05/2008
(240) 508-Capitol Heights, MDNextel CommunicationsPrince George'sCell Number02/27/1999
(240) 509-Crofton, MDBandwidth.com ClecUnknown03/31/2008
(240) 510-Upper Marlboro, MDXo MarylandPrince George'sLandline10/31/2001
(240) 512-College Park, MDCore CommunicationsUnknown08/08/2006
(240) 514-Cabin John, MDUs Lec Of MarylandMontgomeryLandline01/14/2000
(240) 515-Bethesda, MDNew Cingular Wireless PCS - DCMontgomeryCell Number10/31/2001
(240) 516-Silver Spring, MDUs Lec Of MarylandMontgomeryLandline01/14/2000
(240) 520-Hagerstown, MDSprint Spectrum L.p.Unknown03/29/2006
(240) 522-Cumberland, MDSprint Spectrum L.p.AlleganyCell Number05/01/2002
(240) 523-La Plata, MDXo MarylandCharlesLandline06/30/2001
(240) 524-Russett, MDGlobal Naps SouthPrince George'sLandline02/27/1999
(240) 525-Upper Marlboro, MDGlobal Naps SouthPrince George'sLandline02/27/1999
(240) 526-Leonardtown, MDGlobal Naps SouthSaint Mary'sLandline02/27/1999
(240) 527-Hagerstown, MDVerizon MarylandWashingtonLandline10/31/2000
(240) 528-Hughesville, MDBroadwing Communications. LLCCharlesLandline10/31/2000
(240) 529-Frederick, MDVerizon MarylandFrederickLandline10/31/2000
(240) 533-Mount Rainier, MDTeleport Communications Group - DCPrince George'sLandline07/22/1999
(240) 535-Silver Spring, MDNew Cingular Wireless PCS - DCMontgomeryCell Number06/30/2001
(240) 536-Sandy Spring, MDGlobal Naps SouthMontgomeryLandline02/27/1999
(240) 538-Leonardtown, MDXo MarylandSaint Mary'sLandline06/30/2001
(240) 539-Hyattsville, MDGlobal Naps SouthPrince George'sLandline02/27/1999
(240) 540-None, MDUnknown03/05/2009
(240) 542-College Park, MDUs Lec Of MarylandPrince George'sLandline01/14/2000
(240) 543-Bethesda, MDSprint Spectrum L.p.Unknown07/25/2006
(240) 544-Glenn Dale, MDUs Lec Of MarylandPrince George'sLandline01/14/2000
(240) 545-Upper Marlboro, MDUs Lec Of MarylandPrince George'sLandline01/14/2000
(240) 546-Clinton, MDUs Lec Of MarylandPrince George'sLandline01/14/2000
(240) 547-Russett, MDLevel 3 CommunicationsPrince George'sLandline07/22/1999
(240) 548-Mount Rainier, MDAllegiance TelecomPrince George'sLandline10/31/2000
(240) 550-Rockville, MDLeap Wireless Intl DBA Cricket CommUnknown03/26/2009
(240) 551-Rockville, MDLeap Wireless Intl DBA Cricket CommUnknown03/25/2009
(240) 552-Rockville, MDLeap Wireless Intl DBA Cricket CommUnknown03/25/2009
(240) 553-Mount Rainier, MDAllegiance TelecomPrince George'sLandline08/20/2000
(240) 554-Laurel, MDAllegiance TelecomPrince George'sLandline10/31/2000
(240) 556-Glenn Dale, MDPaetec CommunicationsPrince George'sLandline10/31/2001
(240) 558-Kensington, MDCavalier Telephone Mid-atlanticMontgomeryLandline06/30/2001
(240) 559-Sandy Spring, MDAllegiance TelecomMontgomeryLandline10/31/2000
(240) 560-Chevy Chase, MDXo MarylandMontgomeryLandline10/31/2001
(240) 561-Leonardtown, MDCellco Partnership DBA Verizon WirelessUnknown07/07/2008
(240) 565-Laurel, MDOmnipoint Communications Cap OperationsPrince George'sCell Number06/01/2006
(240) 566-Frederick, MDVerizon MarylandFrederickLandline10/25/2002
(240) 567-Rockville, MDVerizon MarylandUnknown07/12/2006
(240) 568-Laurel, MDVerizon MarylandPrince George'sLandline07/22/1999
(240) 573-Upper Marlboro, MDGlobal Crossing Local Services-mdPrince George'sLandline07/22/1999
(240) 575-Frederick, MDLevel 3 CommunicationsFrederickLandline06/01/2006
(240) 577-Leonardtown, MDCellco Partnership DBA Verizon WirelessUnknown08/09/2006
(240) 578-None, MDCellco Partnership DBA Verizon WirelessUnknown07/08/2011
(240) 580-Cumberland, MDNextel CommunicationsAlleganyCell Number10/31/2001
(240) 581-Laurel, MDPaetec Communications - DCPrince George'sLandline03/03/2001
(240) 582-Hyattsville, MDVerizon MarylandPrince George'sLandline07/22/1999
(240) 583-Beltsville, MDVerizon MarylandUnknown04/28/2010
(240) 585-None, MDCellco Partnership DBA Verizon WirelessUnknown06/29/2011
(240) 586-Frederick, MDVerizon MarylandUnknown12/22/2006
(240) 587-Leonardtown, MDCellco Partnership DBA Verizon WirelessUnknown07/06/2009
(240) 593-Laurel, MDOmnipoint Communications Cap OperationsPrince George'sCell Number06/30/2001
(240) 595-Chevy Chase, MDCellco Partnership DBA Verizon WirelessUnknown09/13/2006
(240) 597-Gaithersburg, MDGlobal Naps SouthMontgomeryLandline02/27/1999
(240) 599-Rockville, MDBroadwing Communications. LLCPrince George'sLandline07/22/1999
(240) 600-Bethesda, MDSprint Spectrum L.p.Unknown06/30/2006
(240) 601-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number07/22/1999
(240) 602-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number07/22/1999
(240) 603-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number07/22/1999
(240) 604-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number07/22/1999
(240) 605-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number07/22/1999
(240) 606-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number07/22/1999
(240) 607-Waldorf, MDGlobal Crossing Local Services-mdCharlesLandline05/10/1999
(240) 612-Mount Rainier, MDTw Telecom Of Maryland LLCUnknown08/04/2010
(240) 616-College Park, MDMci Worldcom CommunicationsPrince George'sLandline06/30/2001
(240) 618-None, MDCellco Partnership DBA Verizon WirelessUnknown06/29/2011
(240) 619-Chevy Chase, MDMci Worldcom CommunicationsPrince George'sLandline08/20/2000
(240) 620-Rockville, MDMci Worldcom CommunicationsMontgomeryLandline08/20/2000
(240) 621-Kensington, MDMci Worldcom CommunicationsMontgomeryLandline08/20/2000
(240) 624-Greenbelt, MDVerizon MarylandPrince George'sLandline06/13/2000
(240) 625-Hagerstown, MDNextel CommunicationsWashingtonLandline10/31/2001
(240) 626-Frederick, MDSprint Spectrum L.p.FrederickCell Number05/10/1999
(240) 627-Mount Rainier, MDGlobal Crossing Local Services-mdMontgomeryLandline02/27/1999
(240) 629-Frederick, MDVerizon MarylandFrederickLandline10/13/1999
(240) 631-Gaithersburg, MDVerizon MarylandMontgomeryLandline11/20/1998
(240) 632-Gaithersburg, MDVerizon MarylandMontgomeryLandline07/22/1999
(240) 638-Mount Rainier, MDBroadwing Communications. LLCPrince George'sLandline05/10/1999
(240) 640-Waldorf, MDLeap Wireless Intl DBA Cricket CommUnknown03/24/2009
(240) 641-Rockville, MDTidalwave Telephone Inc.MontgomeryLandline10/13/1999
(240) 642-Rockville, MDTidalwave Telephone Inc.MontgomeryLandline10/13/1999
(240) 643-Silver Spring, MDOmnipoint Communications Cap OperationsMontgomeryCell Number10/25/2002
(240) 644-Chevy Chase, MDXo MarylandMontgomeryLandline10/31/2000
(240) 645-Chevy Chase, MDXo MarylandMontgomeryLandline10/31/2000
(240) 646-Laurel, MDCavalier East LLCPrince George'sLandline10/13/1999
(240) 652-Mechanicsville, MDXo MarylandSaint Mary'sLandline06/30/2001
(240) 654-Gaithersburg, MDNew Cingular Wireless PCS - DCUnknown05/19/2006
(240) 662-Silver Spring, MDVerizon MarylandMontgomeryLandline01/14/2000
(240) 667-Mount Rainier, MDGlobal Crossing Local Services-mdPrince George'sLandline02/27/1999
(240) 668-Damascus, MDStarpower CommunicationsMontgomeryLandline11/20/1998
(240) 669-Kensington, MDComcast Phone Of Northern MarylandMontgomeryLandline10/31/2000
(240) 671-Mount Rainier, MDSprint Spectrum L.p.MontgomeryLandline10/31/2000
(240) 672-Rockville, MDCellco Partnership DBA Verizon WirelessMontgomeryLandline10/31/2000
(240) 674-Frederick, MDNextel CommunicationsFrederickCell Number10/13/1999
(240) 675-Myersville, MDNew Cingular Wireless PCS - DCFrederickCell Number05/10/1999
(240) 676-Silver Spring, MDCellco Partnership DBA Verizon WirelessMontgomeryCell Number02/27/1999
(240) 678-Silver Spring, MDCellco Partnership DBA Verizon WirelessMontgomeryCell Number02/27/1999
(240) 681-Brandywine, MDAtx Telecommunications Services, LtdPrince George'sLandline06/30/2001
(240) 682-Waldorf, MDStarpower CommunicationsCharlesLandline11/20/1998
(240) 683-Gaithersburg, MDVerizon MarylandMontgomeryLandline03/03/2001
(240) 684-Greenbelt, MDVerizon MarylandPrince George'sLandline10/31/2000
(240) 685-Brandywine, MDGlobal Crossing Local Services-mdPrince George'sLandline05/10/1999
(240) 686-Gaithersburg, MDVerizon MarylandMontgomeryLandline03/03/2001
(240) 687-Silver Spring, MDCellco Partnership DBA Verizon WirelessMontgomeryCell Number02/27/1999
(240) 688-Silver Spring, MDCellco Partnership DBA Verizon WirelessUnknown06/12/2006
(240) 691-Mount Rainier, MDGlobal Crossing Local Services-mdPrince George'sLandline02/27/1999
(240) 694-Rockville, MDVerizon MarylandMontgomeryLandline11/20/1998
(240) 695-Temple Hills, MDVerizon MarylandPrince George'sLandline11/20/1998
(240) 696-Hyattsville, MDLevel 3 CommunicationsPrince George'sLandline07/22/1999
(240) 699-Adamstown, MDVerizon MarylandFrederickLandline10/31/2001
(240) 701-Silver Spring, MDLeap Wireless Intl DBA Cricket CommUnknown03/25/2009
(240) 702-None, MDUnknown03/26/2009
(240) 704-Mount Rainier, MDLeap Wireless Intl DBA Cricket CommUnknown03/25/2009
(240) 705-Chevy Chase, MDLeap Wireless Intl DBA Cricket CommUnknown03/25/2009
(240) 706-Chevy Chase, MDLeap Wireless Intl DBA Cricket CommUnknown03/26/2009
(240) 715-Rockville, MDGlobal Crossing Local Services-mdMontgomeryLandline02/27/1999
(240) 718-Callaway, MDXo MarylandSaint Mary'sLandline06/30/2001
(240) 720-Gaithersburg, MDGlobal Crossing Local Services-mdMontgomeryLandline02/27/1999
(240) 722-Sandy Spring, MDGlobal Crossing Local Services-mdMontgomeryLandline02/27/1999
(240) 723-Silver Spring, MDCellco Partnership DBA Verizon WirelessMontgomeryLandline05/10/1999
(240) 724-Oxon Hill, MDCavalier East LLCPrince George'sLandline10/31/2000
(240) 725-Lexington Park, MDVerizon MarylandSaint Mary'sLandline11/20/1998
(240) 727-Cumberland, MDNew Cingular Wireless PCS - DCAlleganyCell Number07/22/1999
(240) 731-Rockville, MDNew Cingular Wireless PCS - DCMontgomeryCell Number10/31/2000
(240) 737-Mount Rainier, MDCavalier East LLCPrince George'sLandline07/22/1999
(240) 743-Oxon Hill, MDNew Cingular Wireless PCS - DCUnknown11/16/2006
(240) 744-Mount Rainier, MDBroadwing Communications. LLCPrince George'sLandline05/10/1999
(240) 745-Damascus, MDXo MarylandMontgomeryLandline10/31/2001
(240) 747-Kensington, MDCavalier East LLCMontgomeryLandline10/13/1999
(240) 750-Gaithersburg, MDNew Cingular Wireless PCS - DCMontgomeryCell Number10/13/2005
(240) 751-Gaithersburg, MDTelcove OperationsMontgomeryLandline08/20/2000
(240) 752-Bethesda, MDTelcove OperationsMontgomeryLandline08/20/2000
(240) 753-Rockville, MDTelcove OperationsMontgomeryLandline08/20/2000
(240) 755-Laurel, MDComcast Phone Of Northern MarylandPrince George'sLandline06/01/2006
(240) 757-College Park, MDGlobal Naps SouthPrince George'sLandline07/22/1999
(240) 764-Hyattsville, MDXo MarylandPrince George'sLandline10/31/2000
(240) 765-Chevy Chase, MDXo MarylandPrince George'sLandline10/31/2000
(240) 766-Chevy Chase, MDXo MarylandPrince George'sLandline10/31/2000
(240) 767-Capitol Heights, MDCavalier East LLCPrince George'sLandline10/13/1999
(240) 770-Oxon Hill, MDComcast Phone Of Northern MarylandPrince George'sLandline03/27/2005
(240) 773-Rockville, MDVerizon MarylandMontgomeryLandline10/13/1999
(240) 776-La Plata, MDBroadwing Communications. LLCCharlesLandline05/10/1999
(240) 777-Rockville, MDVerizon MarylandMontgomeryLandline05/10/1999
(240) 778-Chevy Chase, MDXo MarylandMontgomeryLandline10/31/2000
(240) 779-Sandy Spring, MDCavalier East LLCMontgomeryLandline10/31/2000
(240) 780-Gaithersburg, MDBroadwing Communications. LLCMontgomeryLandline05/10/1999
(240) 782-Damascus, MDGlobal Crossing Local Services-mdMontgomeryLandline05/10/1999
(240) 783-Bethesda, MDMte DBA Mte Paging NetworkMontgomeryCell Number05/10/1999
(240) 784-Myersville, MDOmnipoint Communications Cap OperationsFrederickCell Number10/31/2001
(240) 786-Laurel, MDBroadwing Communications. LLCPrince George'sLandline05/10/1999
(240) 787-Brandywine, MDBroadwing Communications. LLCPrince George'sLandline05/10/1999
(240) 788-Mount Rainier, MDBroadwing Communications. LLCPrince George'sLandline05/10/1999
(240) 790-Mount Rainier, MDBroadwing Communications. LLCPrince George'sLandline05/10/1999
(240) 793-Gaithersburg, MDNextel CommunicationsMontgomeryCell Number06/30/2001
(240) 794-Callaway, MDBroadwing Communications. LLCSaint Mary'sLandline05/10/1999
(240) 804-Newburg, MDXo MarylandCharlesLandline10/31/2001
(240) 812-Poolesville, MDGlobal Crossing Local Services-mdMontgomeryLandline05/10/1999
(240) 813-Gaithersburg, MDAtx Telecommunications Services, LtdMontgomeryLandline06/30/2001
(240) 818-Smithsburg, MDVerizon MarylandWashingtonLandline10/13/1999
(240) 821-Silver Spring, MDLightwave CommunicationsMontgomeryLandline10/13/2005
(240) 823-Brandywine, MDXo MarylandPrince George'sLandline06/30/2001
(240) 825-None, MDUnknown03/13/2007
(240) 826-Rockville, MDVerizon MarylandUnknown05/07/2007
(240) 832-Bethesda, MDNextel CommunicationsMontgomeryCell Number05/10/1999
(240) 833-Chevy Chase, MDXo MarylandMontgomeryLandline10/31/2000
(240) 835-None, MDMontgomeryLandline10/31/2000
(240) 837-Hughesville, MDXo MarylandCharlesLandline06/30/2001
(240) 838-Oxon Hill, MDOmnipoint Communications Cap OperationsPrince George'sCell Number06/30/2001
(240) 839-Silver Spring, MDCellco Partnership DBA Verizon WirelessUnknown01/13/2007
(240) 841-Laurel, MDAllegiance TelecomPrince George'sLandline10/31/2000
(240) 842-Glenn Dale, MDAllegiance TelecomPrince George'sLandline10/31/2000
(240) 843-College Park, MDAllegiance TelecomPrince George'sLandline10/31/2000
(240) 844-Ridge, MDXo MarylandSaint Mary'sLandline06/30/2001
(240) 845-Chevy Chase, MDXo MarylandPrince George'sLandline10/31/2000
(240) 846-Clinton, MDXo MarylandPrince George'sLandline10/31/2000
(240) 848-Gaithersburg, MDNextel CommunicationsMontgomeryLandline03/03/2001
(240) 855-Bethesda, MDSprint Spectrum L.p.Unknown10/09/2006
(240) 857-Mount Rainier, MDTw Telecom Of Maryland LLCPrince George'sLandline05/10/1999
(240) 863-Laurel, MDTw Telecom Of Maryland LLCPrince George'sLandline05/10/1999
(240) 864-Rockville, MDCavalier East LLCMontgomeryLandline01/14/2000
(240) 865-Baltimore, MDLevel 3 CommunicationsAnne ArundelLandline03/03/2001
(240) 868-Mount Rainier, MDCavalier East LLCMontgomeryLandline10/13/1999
(240) 876-Bethesda, MDNextel CommunicationsMontgomeryCell Number11/20/1998
(240) 880-Mount Rainier, MDBroadwing Communications. LLCPrince George'sLandline07/22/1999
(240) 882-Capitol Heights, MDNextel CommunicationsPrince George'sCell Number11/20/1998
(240) 883-Sandy Spring, MDBroadwing Communications. LLCMontgomeryLandline07/22/1999
(240) 888-Rockville, MDNew Cingular Wireless PCS - DCMontgomeryCell Number03/03/2001
(240) 892-Upper Marlboro, MDBroadwing Communications. LLCPrince George'sLandline07/22/1999
(240) 893-Silver Spring, MDNew Cingular Wireless PCS - DCMontgomeryCell Number03/03/2001
(240) 895-Lexington Park, MDVerizon MarylandSaint Mary'sLandline06/30/2001
(240) 897-Mount Rainier, MDBroadwing Communications. LLCPrince George'sLandline07/22/1999
(240) 898-Mount Rainier, MDBroadwing Communications. LLCPrince George'sLandline07/22/1999
(240) 899-Bethesda, MDOmnipoint Communications Cap OperationsMontgomeryCell Number06/30/2001
(240) 912-Gaithersburg, MDUs Lec Of MarylandMontgomeryLandline01/14/2000
(240) 920-Cumberland, MDLevel 3 CommunicationsAlleganyLandline10/31/2001
(240) 925-Leonardtown, MDCellco Partnership DBA Verizon WirelessSaint Mary'sCell Number02/13/2002
(240) 929-Mount Rainier, MDCavalier East LLCPrince George'sLandline10/13/1999
(240) 938-Ashton, MDOmnipoint Communications Cap OperationsMontgomeryCell Number10/31/2001
(240) 949-Clinton, MDCavalier East LLCPrince George'sLandline10/13/1999
(240) 964-Cumberland, MDVerizon MarylandUnknown05/27/2008
(240) 965-College Park, MDPaetec CommunicationsPrince George'sLandline10/31/2000
(240) 976-None, MDBaltimore-washington Telephone BwtUnknown10/17/2005
(240) 979-Cumberland, MDLevel 3 CommunicationsAlleganyLandline03/03/2001
(240) 986-Nanjemoy, MDXo MarylandCharlesLandline06/30/2001
(240) 988-Beltsville, MDSprint Spectrum L.p.Prince George'sCell Number05/10/1999
(240) 993-Indian Head, MDXo MarylandCharlesLandline06/30/2001
(240) 994-Rockville, MDCellco Partnership DBA Verizon WirelessMontgomeryCell Number10/13/1999
(240) 997-Silver Spring, MDCellco Partnership DBA Verizon WirelessMontgomeryCell Number10/13/1999

Search by City:

Area Codes by Number

200s
300s
400s
500s
600s
700s
800s
900s