240 Area Code

Area Code 240 Map

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Major Cities in Area Code 240

Aspen Hill, MD
Bethesda, MD
Bowie, MD
Chillum, MD
Clinton, MD
College Park, MD
Cumberland, MD
Fairland, MD
Fort Washington, MD
Frederick, MD
Gaithersburg, MD
Germantown, MD
Greenbelt, MD
Hagerstown, MD
Landover, MD
Montgomery Village, MD
North Bethesda, MD
North Laurel, MD
North Potomac, MD
Olney, MD
Oxon Hill-glassmanor, MD
Potomac, MD
Rockville, MD
Silver Spring, MD
South Laurel, MD
St. Charles, MD
Suitland, MD
Waldorf, MD
Wheaton-glenmont, MD
White Oak, MD

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Area Code 240 Details

StateMaryland
Major CityGaithersburg
Timezone:Eastern
Current time:11:59am
Short URL:allareacodes.com/240
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Recent Changes for the 240 Area Code

DateChange
1/13/2007Area code 240 was put into service when (240) 839- was introduced as the first prefix.


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-Prince 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-MontgomeryCell 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-Cellco 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.Unknown
(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-Cellco 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-Unknown03/05/2009
(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-Cellco 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-Cellco 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-Cellco 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-Unknown03/26/2009
(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-Unknown03/13/2007
(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-MontgomeryLandline10/31/2000
(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-Baltimore-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

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