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Gaithersburg, MD Area Codes: List, Map, and Phone Lookup

The city of Gaithersburg is in the state of Maryland. It has the following active area codes:

240
301

Compare Other Services in Gaithersburg, MD

Gaithersburg, MD has the following Exchanges (NXX)

NPA NXX Usage Company Name NXX Introduced Date
301 208 Landline Verizon Maryland, Inc. 02/04/1994
301 208 Landline Verizon Maryland, Inc. 02/04/1994
301 212 Landline Verizon Maryland, Inc. 02/04/1994
301 212 Landline Verizon Maryland, Inc. 02/04/1994
301 216 Landline Verizon Maryland, Inc. 02/04/1994
301 216 Landline Verizon Maryland, Inc. 02/04/1994
240 224 Wireless Cellco Partnership Dba Verizon Wireless - Md 09/10/2012
240 224 Wireless Cellco Partnership Dba Verizon Wireless - Md 09/10/2012
301 240 Landline Verizon Maryland, Inc. 02/04/1994
301 240 Landline Verizon Maryland, Inc. 02/04/1994
240 243 Landline Allegiance Telecom, Inc. - Md 01/14/2000
240 243 Landline Allegiance Telecom, Inc. - Md 01/14/2000
240 246 Landline Starpower Communications, Llc - Md 11/20/1998
240 246 Landline Starpower Communications, Llc - Md 11/20/1998
301 250 Landline Mci Worldcom Communications, Inc. - Md 01/11/1997
301 250 Landline Mci Worldcom Communications, Inc. - Md 01/11/1997
301 252 Wireless Sprint Spectrum L.p. 01/10/1996
301 252 Wireless Sprint Spectrum L.p. 01/10/1996
240 252 Landline Level 3 Communications, Llc - Md 05/10/1999
240 252 Landline Level 3 Communications, Llc - Md 05/10/1999
301 258 Landline Verizon Maryland, Inc. 02/04/1994
301 258 Landline Verizon Maryland, Inc. 02/04/1994
240 261 Landline Neutral Tandem-maryland, Llc - Md 12/23/2015
240 261 Landline Neutral Tandem-maryland, Llc - Md 12/23/2015
240 306 Landline Allegiance Telecom, Inc. - Md 06/13/2000
240 306 Landline Allegiance Telecom, Inc. - Md 06/13/2000
240 327 Landline Core Communications, Inc. - Md 10/31/2000
240 327 Landline Core Communications, Inc. - Md 10/31/2000
301 330 Landline Verizon Maryland, Inc. 02/04/1994
301 330 Landline Verizon Maryland, Inc. 02/04/1994
301 337 Landline Mci Worldcom Communications, Inc. - Md 07/04/1995
301 337 Landline Mci Worldcom Communications, Inc. - Md 07/04/1995
301 353 Landline Verizon Maryland, Inc. 02/04/1994
301 353 Landline Verizon Maryland, Inc. 02/04/1994
301 355 Landline Verizon Maryland, Inc. 12/08/2005
301 355 Landline Verizon Maryland, Inc. 12/08/2005
240 361 Landline Cavalier Telephone Mid-atlantic, Llc - Md 08/20/2000
240 361 Landline Cavalier Telephone Mid-atlantic, Llc - Md 08/20/2000
240 364 Landline Cavalier East Llc - Md 05/09/2001
240 364 Landline Cavalier East Llc - Md 05/09/2001
301 366 Wireless Sprint Spectrum L.p. 10/11/1997
301 366 Wireless Sprint Spectrum L.p. 10/11/1997
301 370 Wireless Sprint Spectrum L.p. 05/18/1998
301 370 Wireless Sprint Spectrum L.p. 05/18/1998
240 372 Wireless Sprint Spectrum L.p. 10/13/1999
240 372 Wireless Sprint Spectrum L.p. 10/13/1999
240 386 Landline Verizon Maryland, Inc. 08/20/2000
240 386 Landline Verizon Maryland, Inc. 08/20/2000
240 388 Wireless Sprint Spectrum L.p. 11/04/2002
240 388 Wireless Sprint Spectrum L.p. 11/04/2002
240 404 Landline Xo Maryland, Llc 02/13/2001
240 404 Landline Xo Maryland, Llc 02/13/2001
301 417 Landline Verizon Maryland, Inc. 02/04/1994
301 417 Landline Verizon Maryland, Inc. 02/04/1994
301 428 Landline Verizon Maryland, Inc. 02/04/1994
301 428 Landline Verizon Maryland, Inc. 02/04/1994
301 444 Landline Verizon Maryland, Inc. 01/25/1998
301 444 Landline Verizon Maryland, Inc. 01/25/1998
240 449 Wireless New Cingular Wireless Pcs, Llc - Dc 03/03/2001
240 449 Wireless New Cingular Wireless Pcs, Llc - Dc 03/03/2001
240 454 Wireless Paetec Communications, Inc. - Md 04/22/2005
240 454 Wireless Paetec Communications, Inc. - Md 04/22/2005
240 474 Landline Baltimore-washington Telephone (bwt) 05/22/2015
240 474 Landline Baltimore-washington Telephone (bwt) 05/22/2015
240 477 Landline Lightwave Communications, Llc - Md 05/20/2005
240 477 Landline Lightwave Communications, Llc - Md 05/20/2005
301 515 Landline Verizon Maryland, Inc. 01/10/1996
301 515 Landline Verizon Maryland, Inc. 01/10/1996
301 519 Landline Verizon Maryland, Inc. 04/01/1997
301 519 Landline Verizon Maryland, Inc. 04/01/1997
301 525 Landline Quantum Telecommunications, Inc. - Md 10/16/2003
301 525 Landline Quantum Telecommunications, Inc. - Md 10/16/2003
301 527 Landline Verizon Maryland, Inc. 02/11/1995
301 527 Landline Verizon Maryland, Inc. 02/11/1995
301 528 Landline Verizon Maryland, Inc. 08/14/1998
301 528 Landline Verizon Maryland, Inc. 08/14/1998
301 540 Landline Verizon Maryland, Inc. 02/04/1994
301 540 Landline Verizon Maryland, Inc. 02/04/1994
301 548 Landline Verizon Maryland, Inc. 02/11/1995
301 548 Landline Verizon Maryland, Inc. 02/11/1995
301 556 Landline Teleport Communications America, Llc - Dc 10/11/1997
301 556 Landline Teleport Communications America, Llc - Dc 10/11/1997
240 562 Landline Mcimetro Access Transmission Services Llc 06/12/2015
240 562 Landline Mcimetro Access Transmission Services Llc 06/12/2015
301 569 Wireless Cellco Partnership Dba Verizon Wireless - Md 08/14/1998
301 569 Wireless Cellco Partnership Dba Verizon Wireless - Md 08/14/1998
301 590 Landline Verizon Maryland, Inc. 02/04/1994
301 590 Landline Verizon Maryland, Inc. 02/04/1994
301 591 Landline Paetec Communications, Inc. - Md 08/14/1998
301 591 Landline Paetec Communications, Inc. - Md 08/14/1998
240 597 Landline Peerless Network Of Maryland, Llc 02/27/1999
240 597 Landline Peerless Network Of Maryland, Llc 02/27/1999
301 601 Landline Verizon Maryland, Inc. 02/04/1994
301 601 Landline Verizon Maryland, Inc. 02/04/1994
240 631 Landline Verizon Maryland, Inc. 11/20/1998
240 631 Landline Verizon Maryland, Inc. 11/20/1998
240 632 Landline Verizon Maryland, Inc. 07/22/1999
240 632 Landline Verizon Maryland, Inc. 07/22/1999
301 640 Landline Verizon Maryland, Inc. 02/04/1994
301 640 Landline Verizon Maryland, Inc. 02/04/1994
240 654 Wireless New Cingular Wireless Pcs, Llc - Dc 05/19/2006
240 654 Wireless New Cingular Wireless Pcs, Llc - Dc 05/19/2006
301 670 Landline Verizon Maryland, Inc. 02/04/1994
301 670 Landline Verizon Maryland, Inc. 02/04/1994
240 683 Landline Verizon Maryland, Inc. 03/03/2001
240 683 Landline Verizon Maryland, Inc. 03/03/2001
240 686 Landline Verizon Maryland, Inc. 03/03/2001
240 686 Landline Verizon Maryland, Inc. 03/03/2001
240 690 Landline Teleport Communications America, Llc - Dc 11/10/2016
240 690 Landline Teleport Communications America, Llc - Dc 11/10/2016
240 702 Wireless Cellco Partnership Dba Verizon Wireless - Md 10/07/2014
240 702 Wireless Cellco Partnership Dba Verizon Wireless - Md 10/07/2014
240 720 Landline Global Crossing Local Services, Inc.-md 02/27/1999
240 720 Landline Global Crossing Local Services, Inc.-md 02/27/1999
301 721 Landline Verizon Maryland, Inc. 10/15/1996
301 721 Landline Verizon Maryland, Inc. 10/15/1996
301 740 Landline Verizon Maryland, Inc. 04/22/2004
301 740 Landline Verizon Maryland, Inc. 04/22/2004
240 750 Wireless New Cingular Wireless Pcs, Llc - Dc 05/06/2005
240 750 Wireless New Cingular Wireless Pcs, Llc - Dc 05/06/2005
240 751 Landline Telcove Operations, Inc. - Md 08/20/2000
240 751 Landline Telcove Operations, Inc. - Md 08/20/2000
240 780 Landline Broadwing Communications. Llc - Md 05/10/1999
240 780 Landline Broadwing Communications. Llc - Md 05/10/1999
240 793 Wireless Sprint Spectrum L.p. 03/15/2001
240 793 Wireless Sprint Spectrum L.p. 03/15/2001
240 801 Wireless Cellco Partnership Dba Verizon Wireless - Md 10/04/2013
240 801 Wireless Cellco Partnership Dba Verizon Wireless - Md 10/04/2013
240 805 Wireless Cellco Partnership Dba Verizon Wireless - Md 11/17/2015
240 805 Wireless Cellco Partnership Dba Verizon Wireless - Md 11/17/2015
240 813 Landline Atx Telecommunications Services, Ltd 06/30/2001
240 813 Landline Atx Telecommunications Services, Ltd 06/30/2001
301 820 Landline At&t Local 11/20/1998
301 820 Landline At&t Local 11/20/1998
301 840 Landline Verizon Maryland, Inc. 02/04/1994
301 840 Landline Verizon Maryland, Inc. 02/04/1994
240 848 Wireless Sprint Spectrum L.p. 03/03/2001
240 848 Wireless Sprint Spectrum L.p. 03/03/2001
301 869 Landline Verizon Maryland, Inc. 02/04/1994
301 869 Landline Verizon Maryland, Inc. 02/04/1994
301 903 Landline Verizon Maryland, Inc. 02/04/1994
301 903 Landline Verizon Maryland, Inc. 02/04/1994
240 912 Landline Us Lec Of Maryland, Inc. 01/14/2000
240 912 Landline Us Lec Of Maryland, Inc. 01/14/2000
301 921 Landline Verizon Maryland, Inc. 02/04/1994
301 921 Landline Verizon Maryland, Inc. 02/04/1994
301 926 Landline Verizon Maryland, Inc. 02/04/1994
301 926 Landline Verizon Maryland, Inc. 02/04/1994
301 944 Landline Mcimetro Access Transmission Services Llc 11/20/1998
301 944 Landline Mcimetro Access Transmission Services Llc 11/20/1998
301 947 Landline Verizon Maryland, Inc. 04/15/1996
301 947 Landline Verizon Maryland, Inc. 04/15/1996
301 948 Landline Verizon Maryland, Inc. 02/04/1994
301 948 Landline Verizon Maryland, Inc. 02/04/1994
301 963 Landline Verizon Maryland, Inc. 02/04/1994
301 963 Landline Verizon Maryland, Inc. 02/04/1994
301 972 Landline Verizon Maryland, Inc. 02/04/1994
301 972 Landline Verizon Maryland, Inc. 02/04/1994
301 975 Landline Verizon Maryland, Inc. 02/04/1994
301 975 Landline Verizon Maryland, Inc. 02/04/1994
301 977 Landline Verizon Maryland, Inc. 02/04/1994
301 977 Landline Verizon Maryland, Inc. 02/04/1994
301 978 Landline Verizon Maryland, Inc. 10/11/1997
301 978 Landline Verizon Maryland, Inc. 10/11/1997
301 979 Landline Verizon Maryland, Inc. 04/15/1996
301 979 Landline Verizon Maryland, Inc. 04/15/1996
301 987 Landline Verizon Maryland, Inc. 10/11/1997
301 987 Landline Verizon Maryland, Inc. 10/11/1997
301 990 Landline Verizon Maryland, Inc. 02/04/1994
301 990 Landline Verizon Maryland, Inc. 02/04/1994

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