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Upper Marlboro, MD Area Codes: List, Map, and Phone Lookup

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

240
301

Compare Other Services in Upper Marlboro, MD

Upper Marlboro, MD has the following Exchanges (NXX)

NPA NXX Usage Company Name NXX Introduced Date
301 218 Landline Verizon Maryland, Inc. 01/10/1996
301 249 Landline Verizon Maryland, Inc. 02/04/1994
240 253 Landline Global Crossing Local Services, Inc.-md 02/27/1999
301 298 Landline Mcimetro Access Transmission Services Llc 04/01/1997
301 298 Landline Mcimetro Access Transmission Services Llc 04/01/1997
240 326 Landline Cavalier Telephone Mid-atlantic, Llc - Md 08/20/2000
240 326 Landline Cavalier Telephone Mid-atlantic, Llc - Md 08/20/2000
301 327 Landline Comcast Phone Of Northern Maryland, Inc. - Md 03/09/2006
301 327 Landline Comcast Phone Of Northern Maryland, Inc. - Md 03/09/2006
240 339 Landline Cavalier East Llc - Md 10/31/2000
240 339 Landline Cavalier East Llc - Md 10/31/2000
301 358 Landline Level 3 Communications, Llc - Md 10/11/1997
301 358 Landline Level 3 Communications, Llc - Md 10/11/1997
240 407 Landline Global Crossing Local Services, Inc.-md 02/27/1999
301 430 Landline Verizon Maryland, Inc. 10/11/1997
301 494 Landline Verizon Maryland, Inc. 10/15/1996
301 494 Landline Verizon Maryland, Inc. 10/15/1996
240 510 Landline Xo Maryland, Llc 10/31/2001
240 510 Landline Xo Maryland, Llc 10/31/2001
240 525 Landline Peerless Network Of Maryland, Llc 02/27/1999
240 525 Landline Peerless Network Of Maryland, Llc 02/27/1999
240 545 Landline Us Lec Of Maryland, Inc. 01/14/2000
240 545 Landline Us Lec Of Maryland, Inc. 01/14/2000
240 573 Landline Global Crossing Local Services, Inc.-md 07/22/1999
301 574 Landline Verizon Maryland, Inc. 02/11/1995
301 574 Landline Verizon Maryland, Inc. 02/11/1995
240 607 Landline Global Crossing Local Services, Inc.-md 05/10/1999
301 627 Landline Verizon Maryland, Inc. 02/04/1994
301 627 Landline Verizon Maryland, Inc. 02/04/1994
240 685 Landline Global Crossing Local Services, Inc.-md 05/10/1999
240 691 Landline Global Crossing Local Services, Inc.-md 02/27/1999
301 715 Landline Teleport Communications America, Llc - Dc 08/14/1998
301 715 Landline Teleport Communications America, Llc - Dc 08/14/1998
301 780 Landline Verizon Maryland, Inc. 01/25/1998
301 780 Landline Verizon Maryland, Inc. 01/25/1998
301 855 Landline Verizon Maryland, Inc. 02/04/1994
301 855 Landline Verizon Maryland, Inc. 02/04/1994
240 892 Landline Broadwing Communications. Llc - Md 07/22/1999
240 892 Landline Broadwing Communications. Llc - Md 07/22/1999
301 952 Landline Verizon Maryland, Inc. 02/04/1994
301 952 Landline Verizon Maryland, Inc. 02/04/1994

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