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240 Area Code

Area Code 240 Details

State: Maryland
Major City: Gaithersburg
Timezone: Eastern
Current time: 9:52am
Short URL: allareacodes.com/240
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Area Code 240 Map

Click Here for a Printable Map: 240 Area Code Map

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

Recent Changes for the 240 Area Code

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

Area Code 240 Prefixes

Prefix Primary City Company County Usage Introduced
(240) 200- Mount Rainier, MD Bandwidth.com Clec Unknown 10/04/2010
(240) 201- Ridge, MD Global Naps South Saint Mary's Landline 07/22/1999
(240) 205- Rockville, MD New Cingular Wireless PCS - DC Montgomery Cell Number 01/27/2004
(240) 206- Glenn Dale, MD Xo Maryland Prince George's Landline 10/31/2001
(240) 207- Damascus, MD Cavalier East LLC Montgomery Landline 08/20/2000
(240) 208- La Plata, MD Global Naps South Charles Landline 07/22/1999
(240) 209- Indian Head, MD Global Naps South Charles Landline 07/22/1999
(240) 210- Waldorf, MD New Cingular Wireless PCS - DC Charles Cell Number 08/20/2000
(240) 212- Oakland, MD Core Communications Garrett Landline 06/13/2000
(240) 213- Waldorf, MD Global Naps South Charles Landline 07/22/1999
(240) 214- Mechanicsville, MD Global Naps South Saint Mary's Landline 07/22/1999
(240) 215- Frederick, MD Telcove Operations Frederick Landline 01/14/2000
(240) 216- Waldorf, MD Nextel Communications Charles Cell Number 06/30/2001
(240) 217- Hagerstown, MD Omnipoint Communications Cap Operations Washington Cell Number 06/30/2001
(240) 218- Nanjemoy, MD Global Naps South Charles Landline 02/27/1999
(240) 219- Newburg, MD Global Naps South Charles Landline 07/22/1999
(240) 220- Poolesville, MD Global Naps South Montgomery Landline 02/27/1999
(240) 221- Rockville, MD Verizon Maryland Montgomery Landline 05/10/1999
(240) 222- Waldorf, MD Cavalier Telephone Mid-atlantic Charles Landline 08/20/2000
(240) 223- Mount Rainier, MD Allegiance Telecom Prince George's Landline 02/27/1999
(240) 224- Prince George's Cell Number 10/13/1999
(240) 225- Frederick, MD Core Communications Frederick Landline 06/13/2000
(240) 228- Laurel, MD Verizon Maryland Prince George's Landline 11/20/1998
(240) 229- Waldorf, MD Broadwing Communications. LLC Charles Landline 07/22/1999
(240) 230- Hughesville, MD Global Crossing Local Services-md Charles Landline 05/10/1999
(240) 231- Hagerstown, MD Core Communications Washington Landline 06/13/2000
(240) 232- Mount Rainier, MD Broadwing Communications. LLC Prince George's Landline 07/22/1999
(240) 233- Newburg, MD Teleport Communications Group - DC Charles Landline 02/27/1999
(240) 234- Montgomery Cell Number 05/10/1999
(240) 235- Bethesda, MD Paetec Communications Montgomery Landline 10/13/1999
(240) 236- Frederick, MD Verizon Maryland Frederick Landline 06/13/2000
(240) 237- Callaway, MD Teleport Communications Group - DC Saint Mary's Landline 02/27/1999
(240) 238- Rockville, MD Paetec Communications Montgomery Landline 10/13/1999
(240) 239- Leonardtown, MD Core Communications Saint Mary's Landline 10/31/2000
(240) 241- Chevy Chase, MD Starpower Communications Prince George's Landline 02/27/1999
(240) 242- Kensington, MD Starpower Communications Montgomery Landline 02/27/1999
(240) 243- Gaithersburg, MD Allegiance Telecom Montgomery Landline 01/14/2000
(240) 244- Mount Rainier, MD Starpower Communications Prince George's Landline 02/27/1999
(240) 245- Glenn Dale, MD Starpower Communications Prince George's Landline 02/27/1999
(240) 246- Gaithersburg, MD Starpower Communications Montgomery Landline 11/20/1998
(240) 247- Mount Rainier, MD Allegiance Telecom Prince George's Landline 02/27/1999
(240) 248- Ridge, MD Global Naps South Saint Mary's Landline 02/27/1999
(240) 249- Mechanicsville, MD Teleport Communications Group - DC Saint Mary's Landline 02/27/1999
(240) 250- Brandywine, MD Global Naps South Prince George's Landline 02/27/1999
(240) 251- Highfield, MD Core Communications Washington Landline 06/13/2000
(240) 252- Gaithersburg, MD Level 3 Communications Montgomery Landline 05/10/1999
(240) 253- Mount Rainier, MD Global Crossing Local Services-md Prince George's Landline 02/27/1999
(240) 254- Hughesville, MD Teleport Communications Group - DC Charles Landline 02/27/1999
(240) 255- Poolesville, MD Global Naps South Montgomery Landline 07/22/1999
(240) 256- Leonardtown, MD Teleport Communications Group - DC Saint Mary's Landline 02/27/1999
(240) 257- Nanjemoy, MD Teleport Communications Group - DC Charles Landline 02/27/1999
(240) 258- Ridge, MD Teleport Communications Group - DC Saint Mary's Landline 02/27/1999
(240) 260- Mount Rainier, MD Allegiance Telecom Prince George's Landline 06/13/2000
(240) 261- Rockville, MD Global Naps South Montgomery Landline 02/27/1999
(240) 262- Damascus, MD Tidalwave Telephone Inc. Montgomery Landline 10/13/1999
(240) 263- Damascus, MD Tidalwave Telephone Inc. Montgomery Landline 10/13/1999
(240) 264- Beltsville, MD Verizon Maryland Prince George's Landline 02/27/1999
(240) 265- Capitol Heights, MD Tidalwave Telephone Inc. Prince George's Landline 10/13/1999
(240) 266- Glenn Dale, MD Global Naps South Prince George's Landline 02/27/1999
(240) 267- Capitol Heights, MD Tidalwave Telephone Inc. Prince George's Landline 10/13/1999
(240) 268- Rockville, MD Allegiance Telecom Prince George's Landline 02/27/1999
(240) 269- Clinton, MD Global Naps South Prince George's Landline 02/27/1999
(240) 270- Glenn Dale, MD Tidalwave Telephone Inc. Prince George's Landline 10/13/1999
(240) 271- Bethesda, MD New Cingular Wireless PCS - DC Montgomery Cell Number 02/27/1999
(240) 272- Glenn Dale, MD Tidalwave Telephone Inc. Prince George's Landline 10/13/1999
(240) 273- Mount Rainier, MD Broadwing Communications. LLC Prince George's Landline 07/22/1999
(240) 274- Bethesda, MD New Cingular Wireless PCS - DC Montgomery Cell Number 02/27/1999
(240) 275- Grantsville, MD Core Communications Garrett Landline 10/31/2000
(240) 276- Rockville, MD Verizon Maryland Montgomery Landline 12/13/2004
(240) 277- Bethesda, MD Sprint Spectrum L.p. Montgomery Cell Number 02/09/2003
(240) 278- Cellco Partnership DBA Verizon Wireless Unknown 07/08/2011
(240) 279- Waldorf, MD Core Communications Charles Landline 10/31/2000
(240) 280- Laurel, MD Comcast Phone Of Northern Maryland Anne Arundel Landline 03/03/2001
(240) 281- Bethesda, MD New Cingular Wireless PCS - DC Montgomery Cell Number 10/13/1999
(240) 282- Mechanicsville, MD Global Naps South Saint Mary's Landline 02/27/1999
(240) 283- Kensington, MD Paetec Communications Montgomery Landline 10/13/1999
(240) 284- Frostburg, MD Nationsline Allegany Landline 03/27/2005
(240) 285- Frederick, MD Cellco Partnership DBA Verizon Wireless Frederick Landline 06/13/2000
(240) 286- Bethesda, MD Nextel Communications Montgomery Cell Number 02/09/2003
(240) 287- Hancock, MD Core Communications Washington Landline 06/13/2000
(240) 288- Thurmont, MD Nationsline Frederick Landline 03/27/2005
(240) 289- Oxon Hill, MD Cavalier Telephone Mid-atlantic Prince George's Landline 08/20/2000
(240) 290- Mount Rainier, MD Allegiance Telecom Prince George's Landline 02/27/1999
(240) 291- Hagerstown, MD New Cingular Wireless PCS - DC Washington Cell Number 02/09/2003
(240) 292- Kensington, MD Verizon Maryland Montgomery Landline 10/13/1999
(240) 293- Silver Spring, MD Starpower Communications Montgomery Landline 02/27/1999
(240) 294- Laurel, MD Xo Maryland Prince George's Landline 06/30/2001
(240) 295- Laurel, MD Cavalier Telephone Mid-atlantic Prince George's Landline 08/20/2000
(240) 296- Hyattsville, MD Cavalier Telephone Mid-atlantic Prince George's Landline 08/20/2000
(240) 297- College Park, MD Level 3 Communications Prince George's Landline 10/13/1999
(240) 298- Leonardtown, MD Cellco Partnership DBA Verizon Wireless Saint Mary's Cell Number 10/13/1999
(240) 299- Waldorf, MD Nextel Communications Charles Cell Number 10/13/1999
(240) 300- Waldorf, MD Cellco Partnership DBA Verizon Wireless Unknown 12/07/2010
(240) 303- Clinton, MD Cavalier Telephone Mid-atlantic Prince George's Landline 08/20/2000
(240) 304- Mount Rainier, MD Nextel Communications Prince George's Cell Number 02/09/2003
(240) 305- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 02/27/1999
(240) 306- Gaithersburg, MD Allegiance Telecom Montgomery Landline 06/13/2000
(240) 307- Emmitsburg, MD AT&T Local Frederick Landline 08/31/2003
(240) 308- Damascus, MD New Cingular Wireless PCS - DC Montgomery Cell Number 08/20/2000
(240) 310- Hagerstown, MD Uscoc Of Cumberland DBA United States Cel Md Washington Cell Number 02/27/1999
(240) 312- Capitol Heights, MD Cavalier Telephone Mid-atlantic Prince George's Landline 08/20/2000
(240) 313- Hagerstown, MD Verizon Maryland Washington Landline 10/31/2000
(240) 314- Rockville, MD Verizon Maryland Montgomery Landline 06/13/2000
(240) 315- Frederick, MD Verizon Maryland Frederick Landline 08/20/2000
(240) 316- Chevy Chase, MD Sprint Spectrum L.p. Unknown
(240) 317- Callaway, MD Starpower Communications Saint Mary's Landline 11/20/1998
(240) 318- Clinton, MD Verizon Maryland Prince George's Landline 01/14/2000
(240) 319- Columbia, MD Cellco Partnership DBA Verizon Wireless Unknown 06/06/2008
(240) 320- Waldorf, MD Cavalier East LLC Charles Landline 10/31/2000
(240) 321- Oakland, MD Uscoc Of Cumberland DBA United States Cel Md Garrett Cell Number 02/27/1999
(240) 322- Mccoole, MD Core Communications Allegany Landline 10/31/2000
(240) 323- Emmitsburg, MD Core Communications Frederick Landline 10/31/2000
(240) 324- Clarksville, MD Ymax Communications Corp. Unknown 10/08/2008
(240) 325- Damascus, MD Core Communications Montgomery Landline 10/31/2000
(240) 326- Upper Marlboro, MD Cavalier Telephone Mid-atlantic Prince George's Landline 08/20/2000
(240) 327- Gaithersburg, MD Core Communications Montgomery Landline 10/31/2000
(240) 328- Rockville, MD Verizon Maryland Montgomery Landline 08/20/2000
(240) 329- Hagerstown, MD Level 3 Communications Washington Landline 10/31/2000
(240) 330- Cabin John, MD Sprint Spectrum L.p. Unknown 12/14/2007
(240) 331- Silver Spring, MD Global Naps South Montgomery Landline 02/27/1999
(240) 332- Newburg, MD Global Naps South Charles Landline 02/27/1999
(240) 333- Mount Rainier, MD Cavalier East LLC Montgomery Landline 07/22/1999
(240) 334- Mount Rainier, MD Global Crossing Local Services-md Prince George's Landline 02/27/1999
(240) 335- Glenn Dale, MD Cavalier Telephone Mid-atlantic Prince George's Landline 08/20/2000
(240) 336- Bethesda, MD Core Communications Montgomery Landline 10/31/2000
(240) 337- Capitol Heights, MD Global Naps South Prince George's Landline 02/27/1999
(240) 338- Silver Spring, MD Cellco Partnership DBA Verizon Wireless Montgomery Cell Number 01/14/2000
(240) 339- Upper Marlboro, MD Cavalier East LLC Prince George's Landline 10/31/2000
(240) 341- Adamstown, MD Mci Worldcom Communications Unknown 10/27/2008
(240) 342- Sandy Spring, MD Starpower Communications Montgomery Landline 11/20/1998
(240) 343- Cellco Partnership DBA Verizon Wireless Unknown 05/10/2011
(240) 344- Frederick, MD New Cingular Wireless PCS - DC Frederick Cell Number 02/09/2003
(240) 345- Sandy Spring, MD Level 3 Communications Unknown 03/09/2006
(240) 346- Waldorf, MD Sprint Spectrum L.p. Charles Cell Number 08/20/2000
(240) 347- Hagerstown, MD Bandwidth.com Clec Unknown 08/04/2008
(240) 348- Clinton, MD Level 3 Communications Prince George's Landline 08/20/2000
(240) 349- La Plata, MD Global Crossing Local Services-md Charles Landline 05/10/1999
(240) 350- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 05/10/1999
(240) 351- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 05/10/1999
(240) 352- La Plata, MD Global Naps South Charles Landline 02/27/1999
(240) 353- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 05/10/1999
(240) 354- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 05/10/1999
(240) 355- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 05/10/1999
(240) 356- Frederick, MD Level 3 Communications Frederick Landline 03/03/2001
(240) 357- Frederick, MD Cellco Partnership DBA Verizon Wireless Unknown 06/12/2006
(240) 358- Damascus, MD Global Naps South Montgomery Landline 02/27/1999
(240) 359- Indian Head, MD Global Naps South Charles Landline 02/27/1999
(240) 361- Gaithersburg, MD Cavalier Telephone Mid-atlantic Montgomery Landline 08/20/2000
(240) 362- Cumberland, MD Verizon Maryland Allegany Landline 02/27/1999
(240) 363- Kensington, MD Global Naps South Montgomery Landline 02/27/1999
(240) 364- Gaithersburg, MD Cavalier East LLC Montgomery Landline 10/13/1999
(240) 365- Damascus, MD Baltimore-washington Telephone Bwt Montgomery Landline 08/20/2000
(240) 366- Williamsport, MD AT&T Local Washington Landline 03/03/2001
(240) 367- Frederick, MD Nextel Communications Frederick Cell Number 02/09/2003
(240) 368- Waldorf, MD Global Naps South Charles Landline 02/27/1999
(240) 369- Mount Airy, MD Core Communications Frederick Landline 10/31/2000
(240) 370- Bethesda, MD Sprint Spectrum L.p. Unknown 12/14/2007
(240) 371- Silver Spring, MD Global Naps South Montgomery Landline 02/27/1999
(240) 372- Gaithersburg, MD Nextel Communications Montgomery Cell Number 10/13/1999
(240) 373- Odenton, MD Verizon Maryland Anne Arundel Landline 11/20/1998
(240) 374- Laurel, MD Global Crossing Local Services-md Prince George's Landline 02/27/1999
(240) 375- Capitol Heights, MD Nextel Communications Prince George's Cell Number 11/20/1998
(240) 376- Hughesville, MD Global Naps South Charles Landline 02/27/1999
(240) 377- Indian Head, MD Global Crossing Local Services-md Charles Landline 05/10/1999
(240) 378- Cumberland, MD Core Communications Allegany Landline 10/31/2000
(240) 379- Frederick, MD Verizon Maryland Frederick Landline 03/03/2001
(240) 380- Cabin John, MD Cellco Partnership DBA Verizon Wireless Unknown 09/17/2007
(240) 381- Silver Spring, MD New Cingular Wireless PCS - DC Montgomery Cell Number 01/14/2000
(240) 382- Hagerstown, MD Teleport Communications Group America Unknown 06/11/2009
(240) 383- Chevy Chase, MD New Cingular Wireless PCS - DC Montgomery Cell Number 08/20/2000
(240) 384- Callaway, MD Global Naps South Saint Mary's Landline 02/27/1999
(240) 385- Myersville, MD Verizon Maryland Frederick Landline 10/31/2000
(240) 386- Gaithersburg, MD Verizon Maryland Montgomery Landline 08/20/2000
(240) 387- Chevy Chase, MD Cavalier East LLC Prince George's Landline 01/14/2000
(240) 388- Gaithersburg, MD Nextel Communications Montgomery Cell Number 05/09/2003
(240) 389- Sandy Spring, MD Atx Telecommunications Services, Ltd Montgomery Landline 06/30/2001
(240) 390- Sandy Spring, MD Cavalier Telephone Mid-atlantic Montgomery Landline 08/20/2000
(240) 391- Mount Rainier, MD Global Crossing Local Services-md Prince George's Landline 02/27/1999
(240) 392- Capitol Heights, MD Starpower Communications Prince George's Landline 02/27/1999
(240) 393- Silver Spring, MD Cellco Partnership DBA Verizon Wireless Montgomery Cell Number 06/13/2000
(240) 394- Mount Airy, MD New Cingular Wireless PCS - DC Frederick Cell Number 03/27/2005
(240) 395- Bethesda, MD Cavalier Telephone Mid-atlantic Montgomery Landline 08/20/2000
(240) 396- Mount Rainier, MD Global Crossing Local Services-md Montgomery Landline 02/27/1999
(240) 397- Frederick, MD Cellco Partnership DBA Verizon Wireless Unknown 03/06/2009
(240) 398- Silver Spring, MD Nextel Communications Montgomery Cell Number 02/09/2003
(240) 399- Chevy Chase, MD Xo Maryland Montgomery Landline 10/13/1999
(240) 401- Rockville, MD New Cingular Wireless PCS - DC Montgomery Cell Number 11/20/1998
(240) 402- College Park, MD Mci Worldcom Communications Unknown 09/21/2010
(240) 403- Rockville, MD Cavalier Telephone Mid-atlantic Montgomery Landline 08/20/2000
(240) 404- Gaithersburg, MD Xo Maryland Montgomery Landline 06/30/2001
(240) 405- Frederick, MD Us Lec Of Maryland Frederick Landline 03/27/2005
(240) 406- Rockville, MD Leap Wireless Intl DBA Cricket Comm Unknown 09/17/2009
(240) 407- Mount Rainier, MD Global Crossing Local Services-md Prince George's Landline 02/27/1999
(240) 408- Rockville, MD Leap Wireless Intl DBA Cricket Comm Unknown 10/14/2009
(240) 409- Frederick, MD New Cingular Wireless PCS - DC Frederick Cell Number 02/27/1999
(240) 412- Waldorf, MD Sprint Spectrum L.p. Charles Cell Number 06/30/2001
(240) 413- Hyattsville, MD Omnipoint Communications Cap Operations Prince George's Cell Number 06/30/2001
(240) 414- Oxon Hill, MD Global Naps South Prince George's Landline 02/27/1999
(240) 415- Frederick, MD Ymax Communications Corp. Unknown 12/16/2008
(240) 416- Waldorf, MD New Cingular Wireless PCS - DC Charles Cell Number 10/31/2001
(240) 417- Capitol Heights, MD Nextel Communications Prince George's Cell Number 03/03/2001
(240) 418- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 05/01/2002
(240) 419- Waldorf, MD Cellco Partnership DBA Verizon Wireless Unknown 10/29/2007
(240) 420- Hagerstown, MD Verizon Maryland Washington Landline 07/22/1999
(240) 421- Rockville, MD Omnipoint Communications Cap Operations Montgomery Cell Number 10/31/2000
(240) 422- Frederick, MD Omnipoint Communications Cap Operations Frederick Cell Number 10/25/2002
(240) 423- Silver Spring, MD Omnipoint Communications Cap Operations Montgomery Cell Number 10/31/2001
(240) 424- Mount Rainier, MD Sprint Spectrum L.p. Unknown 11/16/2007
(240) 425- Cabin John, MD Dslnet Communications Va Montgomery Landline 06/30/2001
(240) 426- Bethesda, MD Sprint Spectrum L.p. Montgomery Cell Number 02/13/2002
(240) 427- Waldorf, MD Xo Maryland Charles Landline 10/31/2001
(240) 428- Rockville, MD Bandwidth.com Clec Unknown 10/14/2009
(240) 429- Silver Spring, MD Cellco Partnership DBA Verizon Wireless Unknown 12/19/2006
(240) 430- Kensington, MD Cavalier Telephone Mid-atlantic Montgomery Landline 08/20/2000
(240) 431- Tall Timbers, MD Sprint Spectrum L.p. Saint Mary's Cell Number 10/31/2000
(240) 432- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 02/27/1999
(240) 433- Silver Spring, MD Cavalier Telephone Mid-atlantic Montgomery Landline 08/20/2000
(240) 434- Leonardtown, MD Broadwing Communications. LLC Saint Mary's Landline 10/31/2000
(240) 435- Waldorf, MD Cellco Partnership DBA Verizon Wireless Unknown 05/07/2009
(240) 436- Ijamsville, MD Telcove Operations Frederick Landline 08/20/2000
(240) 437- Sandy Spring, MD Xo Maryland Montgomery Landline 06/30/2001
(240) 439- Frederick, MD Cellco Partnership DBA Verizon Wireless Unknown 06/06/2008
(240) 440- Frederick, MD Leap Wireless Intl DBA Cricket Comm Unknown 02/27/2009
(240) 441- Oxon Hill, MD Omnipoint Communications Cap Operations Prince George's Cell Number 10/31/2001
(240) 442- Oakland, MD Verizon Maryland Garrett Landline 10/31/2001
(240) 446- Frederick, MD Cellco Partnership DBA Verizon Wireless Frederick Cell Number 02/13/2002
(240) 447- Rockville, MD New Cingular Wireless PCS - DC Montgomery Cell Number 02/27/1999
(240) 449- Gaithersburg, MD New Cingular Wireless PCS - DC Montgomery Cell Number 03/03/2001
(240) 450- Silver Spring, MD Cavalier Telephone Mid-atlantic Montgomery Landline 08/20/2000
(240) 452- Hagerstown, MD Ntelos Network Inc.-va Unknown 07/22/2010
(240) 453- Rockville, MD Verizon Maryland Montgomery Landline 11/20/1998
(240) 454- Gaithersburg, MD Paetec Communications Montgomery Cell Number 10/13/2005
(240) 455- Capitol Heights, MD Paetec Communications Prince George's Landline 10/31/2001
(240) 456- Laurel, MD Verizon Maryland Prince George's Landline 08/20/2000
(240) 457- Frederick, MD Cellco Partnership DBA Verizon Wireless Unknown 09/04/2008
(240) 459- Laurel, MD Cellco Partnership DBA Verizon Wireless Unknown 07/27/2010
(240) 460- Silver Spring, MD New Cingular Wireless PCS - DC Montgomery Cell Number 07/22/1999
(240) 461- Silver Spring, MD New Cingular Wireless PCS - DC Montgomery Cell Number 07/22/1999
(240) 462- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 02/27/1999
(240) 463- Silver Spring, MD New Cingular Wireless PCS - DC Montgomery Cell Number 02/27/1999
(240) 464- Chevy Chase, MD Nextel Communications Montgomery Landline 05/10/1999
(240) 465- Bethesda, MD Global Naps South Montgomery Landline 02/27/1999
(240) 466- Mechanicsville, MD Global Naps South Saint Mary's Landline 10/31/2001
(240) 468- Mount Rainier, MD Sprint Spectrum L.p. Unknown 11/16/2007
(240) 469- Hagerstown, MD Sprint Spectrum L.p. Unknown 02/14/2008
(240) 471- Silver Spring, MD Global Crossing Local Services-md Montgomery Landline 02/27/1999
(240) 472- Silver Spring, MD New Cingular Wireless PCS - DC Montgomery Cell Number 08/20/2000
(240) 473- College Park, MD Cavalier Telephone Mid-atlantic Prince George's Landline 08/20/2000
(240) 475- Silver Spring, MD New Cingular Wireless PCS - DC Montgomery Cell Number 08/20/2000
(240) 476- Silver Spring, MD Omnipoint Communications Cap Operations Montgomery Cell Number 06/30/2001
(240) 477- Gaithersburg, MD Lightwave Communications Montgomery Landline 10/13/2005
(240) 478- Silver Spring, MD New Cingular Wireless PCS - DC Montgomery Cell Number 03/27/2005
(240) 479- Oxon Hill, MD Cellco Partnership DBA Verizon Wireless Unknown 04/07/2008
(240) 480- Bethesda, MD Sprint Spectrum L.p. Unknown 09/27/2010
(240) 481- Silver Spring, MD Omnipoint Communications Cap Operations Montgomery Cell Number 10/31/2001
(240) 482- Bethesda, MD Us Lec Of Maryland Montgomery Landline 01/14/2000
(240) 483- Bethesda, MD Comcast Phone Of Northern Maryland Montgomery Landline 10/31/2001
(240) 485- Cabin John, MD Us Lec Of Maryland Montgomery Landline 01/14/2000
(240) 486- Glenn Dale, MD Omnipoint Communications Cap Operations Prince George's Cell Number 06/30/2001
(240) 487- Hyattsville, MD Us Lec Of Maryland Prince George's Landline 01/14/2000
(240) 489- Poolesville, MD Xo Maryland Montgomery Landline 06/30/2001
(240) 490- Middletown, MD Omnipoint Communications Cap Operations Frederick Cell Number 10/31/2001
(240) 491- Mount Rainier, MD Global Crossing Local Services-md Montgomery Cell Number 02/27/1999
(240) 492- Capitol Heights, MD Us Lec Of Maryland Prince George's Landline 01/14/2000
(240) 493- Oxon Hill, MD Us Lec Of Maryland Prince George's Landline 01/14/2000
(240) 494- Mount Rainier, MD Cavalier East LLC Montgomery Landline 07/22/1999
(240) 497- Chevy Chase, MD Verizon Maryland Montgomery Landline 10/31/2000
(240) 498- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 10/31/2000
(240) 499- Cabin John, MD Us Lec Of Maryland Montgomery Landline 01/14/2000
(240) 500- Hagerstown, MD Us Lec Of Maryland Unknown 10/21/2010
(240) 501- Silver Spring, MD Sprint Spectrum L.p. Montgomery Cell Number 02/13/2002
(240) 505- Silver Spring, MD Omnipoint Communications Cap Operations Montgomery Cell Number 05/01/2002
(240) 506- Rockville, MD New Cingular Wireless PCS - DC Montgomery Cell Number 05/01/2002
(240) 507- Cabin John, MD Cellco Partnership DBA Verizon Wireless Unknown 09/05/2008
(240) 508- Capitol Heights, MD Nextel Communications Prince George's Cell Number 02/27/1999
(240) 509- Crofton, MD Bandwidth.com Clec Unknown 03/31/2008
(240) 510- Upper Marlboro, MD Xo Maryland Prince George's Landline 10/31/2001
(240) 512- College Park, MD Core Communications Unknown 08/08/2006
(240) 514- Cabin John, MD Us Lec Of Maryland Montgomery Landline 01/14/2000
(240) 515- Bethesda, MD New Cingular Wireless PCS - DC Montgomery Cell Number 10/31/2001
(240) 516- Silver Spring, MD Us Lec Of Maryland Montgomery Landline 01/14/2000
(240) 520- Hagerstown, MD Sprint Spectrum L.p. Unknown 03/29/2006
(240) 522- Cumberland, MD Sprint Spectrum L.p. Allegany Cell Number 05/01/2002
(240) 523- La Plata, MD Xo Maryland Charles Landline 06/30/2001
(240) 524- Russett, MD Global Naps South Prince George's Landline 02/27/1999
(240) 525- Upper Marlboro, MD Global Naps South Prince George's Landline 02/27/1999
(240) 526- Leonardtown, MD Global Naps South Saint Mary's Landline 02/27/1999
(240) 527- Hagerstown, MD Verizon Maryland Washington Landline 10/31/2000
(240) 528- Hughesville, MD Broadwing Communications. LLC Charles Landline 10/31/2000
(240) 529- Frederick, MD Verizon Maryland Frederick Landline 10/31/2000
(240) 533- Mount Rainier, MD Teleport Communications Group - DC Prince George's Landline 07/22/1999
(240) 535- Silver Spring, MD New Cingular Wireless PCS - DC Montgomery Cell Number 06/30/2001
(240) 536- Sandy Spring, MD Global Naps South Montgomery Landline 02/27/1999
(240) 538- Leonardtown, MD Xo Maryland Saint Mary's Landline 06/30/2001
(240) 539- Hyattsville, MD Global Naps South Prince George's Landline 02/27/1999
(240) 540- Unknown 03/05/2009
(240) 542- College Park, MD Us Lec Of Maryland Prince George's Landline 01/14/2000
(240) 543- Bethesda, MD Sprint Spectrum L.p. Unknown 07/25/2006
(240) 544- Glenn Dale, MD Us Lec Of Maryland Prince George's Landline 01/14/2000
(240) 545- Upper Marlboro, MD Us Lec Of Maryland Prince George's Landline 01/14/2000
(240) 546- Clinton, MD Us Lec Of Maryland Prince George's Landline 01/14/2000
(240) 547- Russett, MD Level 3 Communications Prince George's Landline 07/22/1999
(240) 548- Mount Rainier, MD Allegiance Telecom Prince George's Landline 10/31/2000
(240) 550- Rockville, MD Leap Wireless Intl DBA Cricket Comm Unknown 03/26/2009
(240) 551- Rockville, MD Leap Wireless Intl DBA Cricket Comm Unknown 03/25/2009
(240) 552- Rockville, MD Leap Wireless Intl DBA Cricket Comm Unknown 03/25/2009
(240) 553- Mount Rainier, MD Allegiance Telecom Prince George's Landline 08/20/2000
(240) 554- Laurel, MD Allegiance Telecom Prince George's Landline 10/31/2000
(240) 556- Glenn Dale, MD Paetec Communications Prince George's Landline 10/31/2001
(240) 558- Kensington, MD Cavalier Telephone Mid-atlantic Montgomery Landline 06/30/2001
(240) 559- Sandy Spring, MD Allegiance Telecom Montgomery Landline 10/31/2000
(240) 560- Chevy Chase, MD Xo Maryland Montgomery Landline 10/31/2001
(240) 561- Leonardtown, MD Cellco Partnership DBA Verizon Wireless Unknown 07/07/2008
(240) 565- Laurel, MD Omnipoint Communications Cap Operations Prince George's Cell Number 06/01/2006
(240) 566- Frederick, MD Verizon Maryland Frederick Landline 10/25/2002
(240) 567- Rockville, MD Verizon Maryland Unknown 07/12/2006
(240) 568- Laurel, MD Verizon Maryland Prince George's Landline 07/22/1999
(240) 573- Upper Marlboro, MD Global Crossing Local Services-md Prince George's Landline 07/22/1999
(240) 575- Frederick, MD Level 3 Communications Frederick Landline 06/01/2006
(240) 577- Leonardtown, MD Cellco Partnership DBA Verizon Wireless Unknown 08/09/2006
(240) 578- Cellco Partnership DBA Verizon Wireless Unknown 07/08/2011
(240) 580- Cumberland, MD Nextel Communications Allegany Cell Number 10/31/2001
(240) 581- Laurel, MD Paetec Communications - DC Prince George's Landline 03/03/2001
(240) 582- Hyattsville, MD Verizon Maryland Prince George's Landline 07/22/1999
(240) 583- Beltsville, MD Verizon Maryland Unknown 04/28/2010
(240) 585- Cellco Partnership DBA Verizon Wireless Unknown 06/29/2011
(240) 586- Frederick, MD Verizon Maryland Unknown 12/22/2006
(240) 587- Leonardtown, MD Cellco Partnership DBA Verizon Wireless Unknown 07/06/2009
(240) 593- Laurel, MD Omnipoint Communications Cap Operations Prince George's Cell Number 06/30/2001
(240) 595- Chevy Chase, MD Cellco Partnership DBA Verizon Wireless Unknown 09/13/2006
(240) 597- Gaithersburg, MD Global Naps South Montgomery Landline 02/27/1999
(240) 599- Rockville, MD Broadwing Communications. LLC Prince George's Landline 07/22/1999
(240) 600- Bethesda, MD Sprint Spectrum L.p. Unknown 06/30/2006
(240) 601- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 07/22/1999
(240) 602- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 07/22/1999
(240) 603- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 07/22/1999
(240) 604- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 07/22/1999
(240) 605- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 07/22/1999
(240) 606- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 07/22/1999
(240) 607- Waldorf, MD Global Crossing Local Services-md Charles Landline 05/10/1999
(240) 612- Mount Rainier, MD Tw Telecom Of Maryland LLC Unknown 08/04/2010
(240) 616- College Park, MD Mci Worldcom Communications Prince George's Landline 06/30/2001
(240) 618- Cellco Partnership DBA Verizon Wireless Unknown 06/29/2011
(240) 619- Chevy Chase, MD Mci Worldcom Communications Prince George's Landline 08/20/2000
(240) 620- Rockville, MD Mci Worldcom Communications Montgomery Landline 08/20/2000
(240) 621- Kensington, MD Mci Worldcom Communications Montgomery Landline 08/20/2000
(240) 624- Greenbelt, MD Verizon Maryland Prince George's Landline 06/13/2000
(240) 625- Hagerstown, MD Nextel Communications Washington Landline 10/31/2001
(240) 626- Frederick, MD Sprint Spectrum L.p. Frederick Cell Number 05/10/1999
(240) 627- Mount Rainier, MD Global Crossing Local Services-md Montgomery Landline 02/27/1999
(240) 629- Frederick, MD Verizon Maryland Frederick Landline 10/13/1999
(240) 631- Gaithersburg, MD Verizon Maryland Montgomery Landline 11/20/1998
(240) 632- Gaithersburg, MD Verizon Maryland Montgomery Landline 07/22/1999
(240) 638- Mount Rainier, MD Broadwing Communications. LLC Prince George's Landline 05/10/1999
(240) 640- Waldorf, MD Leap Wireless Intl DBA Cricket Comm Unknown 03/24/2009
(240) 641- Rockville, MD Tidalwave Telephone Inc. Montgomery Landline 10/13/1999
(240) 642- Rockville, MD Tidalwave Telephone Inc. Montgomery Landline 10/13/1999
(240) 643- Silver Spring, MD Omnipoint Communications Cap Operations Montgomery Cell Number 10/25/2002
(240) 644- Chevy Chase, MD Xo Maryland Montgomery Landline 10/31/2000
(240) 645- Chevy Chase, MD Xo Maryland Montgomery Landline 10/31/2000
(240) 646- Laurel, MD Cavalier East LLC Prince George's Landline 10/13/1999
(240) 652- Mechanicsville, MD Xo Maryland Saint Mary's Landline 06/30/2001
(240) 654- Gaithersburg, MD New Cingular Wireless PCS - DC Unknown 05/19/2006
(240) 662- Silver Spring, MD Verizon Maryland Montgomery Landline 01/14/2000
(240) 667- Mount Rainier, MD Global Crossing Local Services-md Prince George's Landline 02/27/1999
(240) 668- Damascus, MD Starpower Communications Montgomery Landline 11/20/1998
(240) 669- Kensington, MD Comcast Phone Of Northern Maryland Montgomery Landline 10/31/2000
(240) 671- Mount Rainier, MD Sprint Spectrum L.p. Montgomery Landline 10/31/2000
(240) 672- Rockville, MD Cellco Partnership DBA Verizon Wireless Montgomery Landline 10/31/2000
(240) 674- Frederick, MD Nextel Communications Frederick Cell Number 10/13/1999
(240) 675- Myersville, MD New Cingular Wireless PCS - DC Frederick Cell Number 05/10/1999
(240) 676- Silver Spring, MD Cellco Partnership DBA Verizon Wireless Montgomery Cell Number 02/27/1999
(240) 678- Silver Spring, MD Cellco Partnership DBA Verizon Wireless Montgomery Cell Number 02/27/1999
(240) 681- Brandywine, MD Atx Telecommunications Services, Ltd Prince George's Landline 06/30/2001
(240) 682- Waldorf, MD Starpower Communications Charles Landline 11/20/1998
(240) 683- Gaithersburg, MD Verizon Maryland Montgomery Landline 03/03/2001
(240) 684- Greenbelt, MD Verizon Maryland Prince George's Landline 10/31/2000
(240) 685- Brandywine, MD Global Crossing Local Services-md Prince George's Landline 05/10/1999
(240) 686- Gaithersburg, MD Verizon Maryland Montgomery Landline 03/03/2001
(240) 687- Silver Spring, MD Cellco Partnership DBA Verizon Wireless Montgomery Cell Number 02/27/1999
(240) 688- Silver Spring, MD Cellco Partnership DBA Verizon Wireless Unknown 06/12/2006
(240) 691- Mount Rainier, MD Global Crossing Local Services-md Prince George's Landline 02/27/1999
(240) 694- Rockville, MD Verizon Maryland Montgomery Landline 11/20/1998
(240) 695- Temple Hills, MD Verizon Maryland Prince George's Landline 11/20/1998
(240) 696- Hyattsville, MD Level 3 Communications Prince George's Landline 07/22/1999
(240) 699- Adamstown, MD Verizon Maryland Frederick Landline 10/31/2001
(240) 701- Silver Spring, MD Leap Wireless Intl DBA Cricket Comm Unknown 03/25/2009
(240) 702- Unknown 03/26/2009
(240) 704- Mount Rainier, MD Leap Wireless Intl DBA Cricket Comm Unknown 03/25/2009
(240) 705- Chevy Chase, MD Leap Wireless Intl DBA Cricket Comm Unknown 03/25/2009
(240) 706- Chevy Chase, MD Leap Wireless Intl DBA Cricket Comm Unknown 03/26/2009
(240) 715- Rockville, MD Global Crossing Local Services-md Montgomery Landline 02/27/1999
(240) 718- Callaway, MD Xo Maryland Saint Mary's Landline 06/30/2001
(240) 720- Gaithersburg, MD Global Crossing Local Services-md Montgomery Landline 02/27/1999
(240) 722- Sandy Spring, MD Global Crossing Local Services-md Montgomery Landline 02/27/1999
(240) 723- Silver Spring, MD Cellco Partnership DBA Verizon Wireless Montgomery Landline 05/10/1999
(240) 724- Oxon Hill, MD Cavalier East LLC Prince George's Landline 10/31/2000
(240) 725- Lexington Park, MD Verizon Maryland Saint Mary's Landline 11/20/1998
(240) 727- Cumberland, MD New Cingular Wireless PCS - DC Allegany Cell Number 07/22/1999
(240) 731- Rockville, MD New Cingular Wireless PCS - DC Montgomery Cell Number 10/31/2000
(240) 737- Mount Rainier, MD Cavalier East LLC Prince George's Landline 07/22/1999
(240) 743- Oxon Hill, MD New Cingular Wireless PCS - DC Unknown 11/16/2006
(240) 744- Mount Rainier, MD Broadwing Communications. LLC Prince George's Landline 05/10/1999
(240) 745- Damascus, MD Xo Maryland Montgomery Landline 10/31/2001
(240) 747- Kensington, MD Cavalier East LLC Montgomery Landline 10/13/1999
(240) 750- Gaithersburg, MD New Cingular Wireless PCS - DC Montgomery Cell Number 10/13/2005
(240) 751- Gaithersburg, MD Telcove Operations Montgomery Landline 08/20/2000
(240) 752- Bethesda, MD Telcove Operations Montgomery Landline 08/20/2000
(240) 753- Rockville, MD Telcove Operations Montgomery Landline 08/20/2000
(240) 755- Laurel, MD Comcast Phone Of Northern Maryland Prince George's Landline 06/01/2006
(240) 757- College Park, MD Global Naps South Prince George's Landline 07/22/1999
(240) 764- Hyattsville, MD Xo Maryland Prince George's Landline 10/31/2000
(240) 765- Chevy Chase, MD Xo Maryland Prince George's Landline 10/31/2000
(240) 766- Chevy Chase, MD Xo Maryland Prince George's Landline 10/31/2000
(240) 767- Capitol Heights, MD Cavalier East LLC Prince George's Landline 10/13/1999
(240) 770- Oxon Hill, MD Comcast Phone Of Northern Maryland Prince George's Landline 03/27/2005
(240) 773- Rockville, MD Verizon Maryland Montgomery Landline 10/13/1999
(240) 776- La Plata, MD Broadwing Communications. LLC Charles Landline 05/10/1999
(240) 777- Rockville, MD Verizon Maryland Montgomery Landline 05/10/1999
(240) 778- Chevy Chase, MD Xo Maryland Montgomery Landline 10/31/2000
(240) 779- Sandy Spring, MD Cavalier East LLC Montgomery Landline 10/31/2000
(240) 780- Gaithersburg, MD Broadwing Communications. LLC Montgomery Landline 05/10/1999
(240) 782- Damascus, MD Global Crossing Local Services-md Montgomery Landline 05/10/1999
(240) 783- Bethesda, MD Mte DBA Mte Paging Network Montgomery Cell Number 05/10/1999
(240) 784- Myersville, MD Omnipoint Communications Cap Operations Frederick Cell Number 10/31/2001
(240) 786- Laurel, MD Broadwing Communications. LLC Prince George's Landline 05/10/1999
(240) 787- Brandywine, MD Broadwing Communications. LLC Prince George's Landline 05/10/1999
(240) 788- Mount Rainier, MD Broadwing Communications. LLC Prince George's Landline 05/10/1999
(240) 790- Mount Rainier, MD Broadwing Communications. LLC Prince George's Landline 05/10/1999
(240) 793- Gaithersburg, MD Nextel Communications Montgomery Cell Number 06/30/2001
(240) 794- Callaway, MD Broadwing Communications. LLC Saint Mary's Landline 05/10/1999
(240) 804- Newburg, MD Xo Maryland Charles Landline 10/31/2001
(240) 812- Poolesville, MD Global Crossing Local Services-md Montgomery Landline 05/10/1999
(240) 813- Gaithersburg, MD Atx Telecommunications Services, Ltd Montgomery Landline 06/30/2001
(240) 818- Smithsburg, MD Verizon Maryland Washington Landline 10/13/1999
(240) 821- Silver Spring, MD Lightwave Communications Montgomery Landline 10/13/2005
(240) 823- Brandywine, MD Xo Maryland Prince George's Landline 06/30/2001
(240) 825- Unknown 03/13/2007
(240) 826- Rockville, MD Verizon Maryland Unknown 05/07/2007
(240) 832- Bethesda, MD Nextel Communications Montgomery Cell Number 05/10/1999
(240) 833- Chevy Chase, MD Xo Maryland Montgomery Landline 10/31/2000
(240) 835- Montgomery Landline 10/31/2000
(240) 837- Hughesville, MD Xo Maryland Charles Landline 06/30/2001
(240) 838- Oxon Hill, MD Omnipoint Communications Cap Operations Prince George's Cell Number 06/30/2001
(240) 839- Silver Spring, MD Cellco Partnership DBA Verizon Wireless Unknown 01/13/2007
(240) 841- Laurel, MD Allegiance Telecom Prince George's Landline 10/31/2000
(240) 842- Glenn Dale, MD Allegiance Telecom Prince George's Landline 10/31/2000
(240) 843- College Park, MD Allegiance Telecom Prince George's Landline 10/31/2000
(240) 844- Ridge, MD Xo Maryland Saint Mary's Landline 06/30/2001
(240) 845- Chevy Chase, MD Xo Maryland Prince George's Landline 10/31/2000
(240) 846- Clinton, MD Xo Maryland Prince George's Landline 10/31/2000
(240) 848- Gaithersburg, MD Nextel Communications Montgomery Landline 03/03/2001
(240) 855- Bethesda, MD Sprint Spectrum L.p. Unknown 10/09/2006
(240) 857- Mount Rainier, MD Tw Telecom Of Maryland LLC Prince George's Landline 05/10/1999
(240) 863- Laurel, MD Tw Telecom Of Maryland LLC Prince George's Landline 05/10/1999
(240) 864- Rockville, MD Cavalier East LLC Montgomery Landline 01/14/2000
(240) 865- Baltimore, MD Level 3 Communications Anne Arundel Landline 03/03/2001
(240) 868- Mount Rainier, MD Cavalier East LLC Montgomery Landline 10/13/1999
(240) 876- Bethesda, MD Nextel Communications Montgomery Cell Number 11/20/1998
(240) 880- Mount Rainier, MD Broadwing Communications. LLC Prince George's Landline 07/22/1999
(240) 882- Capitol Heights, MD Nextel Communications Prince George's Cell Number 11/20/1998
(240) 883- Sandy Spring, MD Broadwing Communications. LLC Montgomery Landline 07/22/1999
(240) 888- Rockville, MD New Cingular Wireless PCS - DC Montgomery Cell Number 03/03/2001
(240) 892- Upper Marlboro, MD Broadwing Communications. LLC Prince George's Landline 07/22/1999
(240) 893- Silver Spring, MD New Cingular Wireless PCS - DC Montgomery Cell Number 03/03/2001
(240) 895- Lexington Park, MD Verizon Maryland Saint Mary's Landline 06/30/2001
(240) 897- Mount Rainier, MD Broadwing Communications. LLC Prince George's Landline 07/22/1999
(240) 898- Mount Rainier, MD Broadwing Communications. LLC Prince George's Landline 07/22/1999
(240) 899- Bethesda, MD Omnipoint Communications Cap Operations Montgomery Cell Number 06/30/2001
(240) 912- Gaithersburg, MD Us Lec Of Maryland Montgomery Landline 01/14/2000
(240) 920- Cumberland, MD Level 3 Communications Allegany Landline 10/31/2001
(240) 925- Leonardtown, MD Cellco Partnership DBA Verizon Wireless Saint Mary's Cell Number 02/13/2002
(240) 929- Mount Rainier, MD Cavalier East LLC Prince George's Landline 10/13/1999
(240) 938- Ashton, MD Omnipoint Communications Cap Operations Montgomery Cell Number 10/31/2001
(240) 949- Clinton, MD Cavalier East LLC Prince George's Landline 10/13/1999
(240) 964- Cumberland, MD Verizon Maryland Unknown 05/27/2008
(240) 965- College Park, MD Paetec Communications Prince George's Landline 10/31/2000
(240) 976- Baltimore-washington Telephone Bwt Unknown 10/17/2005
(240) 979- Cumberland, MD Level 3 Communications Allegany Landline 03/03/2001
(240) 986- Nanjemoy, MD Xo Maryland Charles Landline 06/30/2001
(240) 988- Beltsville, MD Sprint Spectrum L.p. Prince George's Cell Number 05/10/1999
(240) 993- Indian Head, MD Xo Maryland Charles Landline 06/30/2001
(240) 994- Rockville, MD Cellco Partnership DBA Verizon Wireless Montgomery Cell Number 10/13/1999
(240) 997- Silver Spring, MD Cellco Partnership DBA Verizon Wireless Montgomery Cell Number 10/13/1999

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