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410 Area Code

About Area Code 410

State: Maryland
Major City: Baltimore
Timezone: Eastern (7:30pm)
Short URL: allareacodes.com/410
Download: Download this data

Area Code 410 Map

  • Annapolis, MD
  • Arbutus, MD
  • Arnold, MD
  • Baltimore, MD
  • Bel Air North, MD
  • Bel Air South, MD
  • Carney, MD
  • Catonsville, MD
  • Columbia, MD
  • Crofton, MD
  • Dundalk, MD
  • Edgewood, MD
  • Eldersburg, MD
  • Elkridge, MD
  • Ellicott City, MD
  • Essex, MD
  • Glen Burnie, MD
  • Lochearn, MD
  • Middle River, MD
  • Milford Mill, MD
  • Odenton, MD
  • Parkville, MD
  • Perry Hall, MD
  • Pikesville, MD
  • Randallstown, MD
  • Reisterstown, MD
  • Salisbury, MD
  • Severn, MD
  • Severna Park, MD
  • South Gate, MD
  • Towson, MD

More About Area Code 410

Area code 410 was first put in service October 6, 1991. In 1997, area code 443 was created as an overlay to area code 410. Currently, the largest city it serves is Baltimore, MD, and it overlaps coverage areas with area codes 443 and 667.

Overview of Active Prefixes

Assigned to Carrier

Usage

Carriers

Active Phone Number Prefixes

Prefix
Usage
Primary City
Carrier
Introduced
Landline
Easton
Mci Worldcom Communications
Introduced 05/27/2004
Landline
Salisbury
Cellco Partnership DBA Verizon Wireless
Introduced 10/14/2004
Landline
Ellicott City
Verizon Maryland
Introduced 07/04/1995
Landline
Arbutus
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 04/15/1996
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 04/15/1996
Landline
Berlin
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 07/01/1996
Wireless
Salisbury
Aquis Communications
Introduced 07/01/1996
Wireless
Annapolis
Sprint Spectrum L.p.
Introduced 01/10/1996
Landline
Ocean City
Verizon Maryland
Introduced 02/04/1994
Landline
Rising Sun
Core Communications
Introduced 03/11/2009
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 02/11/1995
Landline
Annapolis
Verizon Maryland
Introduced 01/10/1996
Wireless
Baltimore
Verizon Maryland
Introduced 04/15/1996
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Landline
Salisbury
Verizon Maryland
Introduced 02/04/1994
Wireless
Elkridge
Sprint Spectrum L.p.
Introduced 09/30/2011
Landline
Cambridge
Verizon Maryland
Introduced 02/04/1994
Landline
Severn
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 09/11/1994
Landline
Annapolis
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Oxford
Verizon Maryland
Introduced 02/04/1994
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 07/04/1995
Landline
Cambridge
Verizon Maryland
Introduced 02/04/1994
Landline
Cockeysville
Verizon Maryland
Introduced 01/10/1996
Landline
Baltimore
Verizon Maryland
Introduced 10/11/1997
Wireless
Solomons
New Cingular Wireless PCS - DC
Introduced 01/10/1996
Wireless
Baltimore
Usa Mobility Wireless
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Towson
New Cingular Wireless PCS - DC
Introduced 04/15/1996
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Essex
Verizon Maryland
Introduced 10/15/1996
Landline
Hampstead
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Sprint Spectrum L.p.
Introduced 10/06/2011
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Landline
Arbutus
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 09/11/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 02/11/1995
Landline
Arbutus
Verizon Maryland
Introduced 02/04/1994
Landline
Parkville
Verizon Maryland
Introduced 01/25/1998
Wireless
Towson
Verizon Maryland
Introduced 10/15/1996
Landline
Ocean City
Verizon Maryland
Introduced 02/04/1994
Wireless
Salisbury
Cellco Partnership DBA Verizon Wireless
Introduced 01/10/1996
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Wireless
Easton
New Cingular Wireless PCS - DC
Introduced 01/10/1996
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Pasadena
Verizon Maryland
Introduced 02/04/1994
Landline
Parkville
Verizon Maryland
Introduced 02/04/1994
Landline
North Beach
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Sprint Spectrum L.p.
Introduced 01/10/1996
Wireless
Westminster
Cellco Partnership DBA Verizon Wireless
Introduced 02/11/1995
Landline
Annapolis
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 10/15/1996
Wireless
Baltimore
Sprint Spectrum L.p.
Introduced 04/01/1997
Landline
Annapolis
Verizon Maryland
Introduced 02/04/1994
Wireless
Laurel
Verizon Maryland
Introduced 07/04/1995
Landline
Woodlawn
Verizon Maryland
Introduced 02/04/1994
Landline
Annapolis
Verizon Maryland
Introduced 02/04/1994
Landline
Annapolis
Verizon Maryland
Introduced 02/04/1994
Landline
Annapolis
Verizon Maryland
Introduced 02/04/1994
Landline
Annapolis
Verizon Maryland
Introduced 02/04/1994
Wireless
Salisbury
Redi-call Communications Co
Introduced 02/04/1994
Wireless
Annapolis
Cellco Partnership DBA Verizon Wireless
Introduced 02/11/1995
Landline
Aberdeen
Verizon Maryland
Introduced 02/04/1994
Landline
Aberdeen
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 02/11/1995
Landline
Warwick
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Woodlawn
Verizon Maryland
Introduced 10/15/1996
Landline
Aberdeen
Verizon Maryland
Introduced 02/04/1994
Wireless
Annapolis
Cellco Partnership DBA Verizon Wireless
Introduced 04/15/1996
Landline
Annapolis
Verizon Maryland
Introduced 02/04/1994
Landline
Woodlawn
Verizon Maryland
Introduced 02/04/1994
Landline
Dundalk
Verizon Maryland
Introduced 02/04/1994
Wireless
Towson
Usa Mobility Wireless
Introduced 04/15/1996
Landline
Dundalk
Verizon Maryland
Introduced 02/04/1994
Landline
Dundalk
Verizon Maryland
Introduced 02/04/1994
Landline
North Beach
Verizon Maryland
Introduced 10/15/1996
Landline
North East
Verizon Maryland
Introduced 02/04/1994
Landline
Dundalk
Verizon Maryland
Introduced 02/04/1994
Landline
Ocean City
Verizon Maryland
Introduced 02/04/1994
Landline
Columbia
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 02/11/1995
Landline
Annapolis
Paetec Communications
Introduced 09/11/1994
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 04/15/1996
Landline
Annapolis
Verizon Maryland
Introduced 04/15/1996
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Aberdeen
Verizon Maryland
Introduced 01/11/1997
Landline
Woodlawn
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 04/01/1997
Wireless
Elkridge
Sprint Spectrum L.p.
Introduced 07/15/2004
Wireless
Baltimore
Sprint Spectrum L.p.
Introduced 10/06/2011
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 04/15/1996
Landline
Queenstown
Idt America Corp
Introduced 03/29/2006
Landline
Odenton
Verizon Maryland
Introduced 02/04/1994
Landline
Aberdeen
Verizon Maryland
Introduced 07/01/1996
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Towson
Verizon Maryland
Introduced 07/01/1996
Landline
Columbia
Verizon Maryland
Introduced 04/15/1996
Wireless
Easton
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Landline
Columbia
Verizon Maryland
Introduced 02/04/1994
Landline
Ellicott City
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 07/01/1996
Landline
Severna Park
Verizon Maryland
Introduced 02/04/1994
Landline
Cockeysville
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 07/01/1996
Landline
Baltimore
Verizon Maryland
Introduced 04/15/1996
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Annapolis
Sprint Spectrum L.p.
Introduced 04/01/1997
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Wireless
Bel Air
New Cingular Wireless PCS - DC
Introduced 07/06/1997
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Solomons
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Cockeysville
Verizon Maryland
Introduced 02/04/1994
Wireless
Cambridge
New Cingular Wireless PCS - DC
Introduced 01/10/1996
Wireless
Elkridge
Usa Mobility Wireless
Introduced 01/10/1996
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Salisbury
Verizon Maryland
Introduced 02/04/1994
Landline
White Marsh
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
New Cingular Wireless PCS - DC
Introduced 10/15/1996
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
New Cingular Wireless PCS - DC
Introduced 10/11/1997
Landline
Salisbury
Verizon Maryland
Introduced 07/04/1995
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Parkton
Verizon Maryland
Introduced 02/04/1994
Landline
White Marsh
Verizon Maryland
Introduced 04/15/1996
Landline
Pikesville
Verizon Maryland
Introduced 04/15/1996
Landline
Westminster
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Still Pond
Verizon Maryland
Introduced 02/04/1994
Landline
Annapolis
Verizon Maryland
Introduced 09/11/1994
Landline
Baltimore
Verizon Maryland
Introduced 10/11/1997
Wireless
Baltimore
Usa Mobility Wireless
Introduced 02/04/1994
Landline
Bishopville
Verizon Maryland
Introduced 02/04/1994
Wireless
Annapolis
Cellco Partnership DBA Verizon Wireless
Introduced 02/11/1995
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Pikesville
Verizon Maryland
Introduced 02/04/1994
Landline
Parkton
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Verizon Maryland
Introduced 09/11/1994
Landline
Pasadena
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Pikesville
Verizon Maryland
Introduced 02/04/1994
Landline
Queen Anne
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Sprint Spectrum L.p.
Introduced 02/11/1995
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Tw Telecom Of Maryland LLC
Introduced 07/06/1997
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 09/11/1994
Landline
Towson
Verizon Maryland
Introduced 07/04/1995
Wireless
Towson
Usa Mobility Wireless
Introduced 02/11/1995
Landline
Hampstead
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 01/10/1996
Landline
Mardela Springs
Verizon Maryland
Introduced 02/04/1994
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Port Deposit
Verizon Maryland
Introduced 02/04/1994
Landline
Elkridge
Verizon Maryland
Introduced 02/04/1994
Wireless
Salisbury
Redi-call Communications Co
Introduced 02/04/1994
Landline
Columbia
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Severna Park
Verizon Maryland
Introduced 10/15/1996
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Westminster
Verizon Maryland
Introduced 02/11/1995
Wireless
Arbutus
Broadview Networks
Introduced 08/12/2011
Landline
Sparrows Point
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Usa Mobility Wireless
Introduced 02/04/1994
Landline
Ocean City
Teleport Communications America
Introduced 06/10/2009
Landline
Essex
Verizon Maryland
Introduced 02/04/1994
Landline
Elkton
Verizon Maryland
Introduced 02/04/1994
Landline
Cockeysville
Verizon Maryland
Introduced 02/04/1994
Landline
Solomons
Verizon Maryland
Introduced 10/15/1996
Wireless
Arbutus
Verizon Maryland
Introduced 09/11/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Crapo
Verizon Maryland
Introduced 02/04/1994
Landline
Elkton
Verizon Maryland
Introduced 02/04/1994
Landline
Bel Air
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Cavalier Telephone Mid-atlantic
Introduced 06/15/2006
Landline
Baltimore
Mci Worldcom Communications
Introduced 07/01/1996
Landline
Baltimore
Mci Worldcom Communications
Introduced 07/01/1996
Landline
Baltimore
Mci Worldcom Communications
Introduced 07/01/1996
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Landline
Fork
Verizon Maryland
Introduced 07/01/1996
Landline
Baltimore
Mci Worldcom Communications
Introduced 07/01/1996
Wireless
Elkridge
Verizon Maryland
Introduced 02/04/1994
Wireless
Towson
Usa Mobility Wireless
Introduced 02/04/1994
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 04/15/1996
Landline
Baltimore
Mci Worldcom Communications
Introduced 07/01/1996
Landline
Baltimore
Mci Worldcom Communications
Introduced 07/01/1996
Landline
Prince Frederick
Verizon Maryland
Introduced 01/10/1996
Landline
Pikesville
Verizon Maryland
Introduced 07/01/1996
Wireless
Laurel
Verizon Maryland
Introduced 01/10/1996
Landline
Edgewood
Verizon Maryland
Introduced 08/16/2007
Landline
Ellicott City
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Sprint Spectrum L.p.
Introduced 07/06/1997
Landline
Bel Air
Verizon Maryland
Introduced 01/25/1998
Landline
Severna Park
Verizon Maryland
Introduced 10/15/1996
Wireless
Salisbury
New Cingular Wireless PCS - DC
Introduced 07/06/1997
Landline
Baltimore
Teleport Communications America
Introduced 04/01/1997
Landline
Glen Burnie
Verizon Maryland
Introduced 10/15/1996
Landline
Ewell
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Teleport Communications America
Introduced 01/10/1996
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 01/10/1996
Landline
Reisterstown
Verizon Maryland
Introduced 02/04/1994
Wireless
Salisbury
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Landline
Severna Park
Verizon Maryland
Introduced 02/11/1995
Landline
Severna Park
Verizon Maryland
Introduced 05/18/1998
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Towson
Usa Mobility Wireless
Introduced 04/01/1997
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Edgewood
Verizon Maryland
Introduced 04/01/1997
Landline
Pasadena
Verizon Maryland
Introduced 02/04/1994
Landline
Barclay
Verizon Maryland
Introduced 02/04/1994
Landline
Pasadena
Verizon Maryland
Introduced 01/10/1996
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Wireless
Elkton
New Cingular Wireless PCS - DC
Introduced 04/01/1997
Landline
Glenwood
Verizon Maryland
Introduced 02/04/1994
Landline
Easton
Level 3 Communications
Introduced 07/23/2002
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Usa Mobility Wireless
Introduced 04/01/1997
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Wireless
Columbia
Usa Mobility Wireless
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Solomons
Bandwidth.com Clec
Introduced 02/12/2010
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Crofton
Verizon Maryland
Introduced 02/04/1994
Landline
Cardiff
Verizon Maryland
Introduced 02/04/1994
Landline
Towson
Verizon Maryland
Introduced 09/11/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 10/11/1997
Landline
Catonsville
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Landline
Darlington
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Wireless
Fallston
Cellco Partnership DBA Verizon Wireless
Introduced 09/11/1994
Wireless
Elkridge
Usa Mobility Wireless
Introduced 07/06/1997
Landline
Ellicott City
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Trappe
Cellco Partnership DBA Verizon Wireless
Introduced 02/11/1995
Landline
Baltimore
Verizon Maryland
Introduced 07/06/1997
Landline
Ellicott City
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 04/01/1997
Landline
Baltimore
Verizon Maryland
Introduced 10/15/1996
Landline
Baltimore
Verizon Maryland
Introduced 06/28/2005
Landline
Elkridge
Verizon Maryland
Introduced 02/04/1994
Landline
Sparks Glencoe
Verizon Maryland
Introduced 02/04/1994
Wireless
Towson
Usa Mobility Wireless
Introduced 01/10/1996
Wireless
Prince Frederick
Cellco Partnership DBA Verizon Wireless
Introduced 04/15/1996
Wireless
Towson
Usa Mobility Wireless
Introduced 02/11/1995
Landline
Trappe
Verizon Maryland
Introduced 02/04/1994
Landline
Sparrows Point
Verizon Maryland
Introduced 02/04/1994
Wireless
Elkridge
Usa Mobility Wireless
Introduced 02/11/1995
Landline
Denton
Verizon Maryland
Introduced 02/04/1994
Landline
Ellicott City
Verizon Maryland
Introduced 01/11/1997
Landline
Greensboro
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Pikesville
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Pikesville
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 01/10/1996
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Glenwood
Verizon Maryland
Introduced 02/04/1994
Wireless
Centreville
Cellco Partnership DBA Verizon Wireless
Introduced 04/01/1997
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 09/11/1994
Wireless
Towson
Usa Mobility Wireless
Introduced 10/15/1996
Wireless
Baltimore
Sprint Spectrum L.p.
Introduced 01/10/1996
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Port Republic
Verizon Maryland
Introduced 04/15/1996
Landline
Randallstown
Verizon Maryland
Introduced 10/15/1996
Landline
Baltimore
Comcast Phone Of Northern Maryland
Introduced 07/06/1997
Landline
Baltimore
Cavalier Telephone Mid-atlantic
Introduced 07/06/1997
Wireless
Baltimore
Sprint Spectrum L.p.
Introduced 10/15/1996
Landline
Baltimore
Verizon Maryland
Introduced 06/25/2005
Landline
Arbutus
Lightwave Communications
Introduced 06/28/2005
Landline
Baltimore
Verizon Maryland
Introduced 10/15/1996
Wireless
Elkridge
Verizon Maryland
Introduced 10/15/1996
Landline
Baltimore
Verizon Maryland
Introduced 07/06/1997
Landline
Ellicott City
Verizon Maryland
Introduced 07/01/1996
Landline
Elkton
Verizon Maryland
Introduced 07/06/1997
Wireless
Annapolis
Cellco Partnership DBA Verizon Wireless
Introduced 04/15/1996
Landline
Glen Burnie
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Baltimore-washington Telephone (bwt)
Introduced 10/11/1997
Landline
Fork
Teleport Communications America
Introduced 07/01/1996
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Teleport Communications America
Introduced 01/25/1998
Landline
Severn
Verizon Maryland
Introduced 02/04/1994
Landline
Abingdon
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Reisterstown
Verizon Maryland
Introduced 10/15/1996
Landline
Severna Park
Verizon Maryland
Introduced 07/01/1996
Landline
Severn
Verizon Maryland
Introduced 02/04/1994
Landline
Ocean City
Verizon Maryland
Introduced 01/25/1998
Landline
Randallstown
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Ocean City
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Reisterstown
Verizon Maryland
Introduced 02/04/1994
Landline
Cockeysville
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Parkville
Verizon Maryland
Introduced 02/04/1994
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 04/01/1997
Landline
Columbia
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Annapolis
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Port Republic
Verizon Maryland
Introduced 02/04/1994
Landline
Arbutus
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Edgewood
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Elkridge
Verizon Maryland
Introduced 10/15/1996
Landline
Severna Park
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Salisbury
Verizon Maryland
Introduced 02/04/1994
Landline
Severna Park
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Salisbury
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Salisbury
Verizon Maryland
Introduced 02/04/1994
Landline
Sykesville
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Severn
Verizon Maryland
Introduced 02/04/1994
Landline
Sykesville
Verizon Maryland
Introduced 04/15/1996
Landline
Glen Burnie
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Church Hill
Verizon Maryland
Introduced 02/04/1994
Landline
Jarrettsville
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Teleport Communications America
Introduced 01/10/1996
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Cockeysville
Verizon Maryland
Introduced 02/04/1994
Wireless
Annapolis
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Teleport Communications America
Introduced 01/10/1996
Landline
Arbutus
Tw Telecom Of Maryland LLC
Introduced 01/25/1998
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 04/01/1997
Landline
Baltimore
Teleport Communications America
Introduced 01/10/1996
Landline
Edgewood
Verizon Maryland
Introduced 02/04/1994
Wireless
Annapolis
New Cingular Wireless PCS - DC
Introduced 07/04/1995
Landline
Annapolis
Verizon Maryland
Introduced 01/10/1996
Landline
Salisbury
Verizon Maryland
Introduced 01/11/1997
Landline
Annapolis
Verizon Maryland
Introduced 02/04/1994
Landline
Essex
Verizon Maryland
Introduced 02/04/1994
Landline
Aberdeen
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 05/10/2005
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Elkridge
Verizon Maryland
Introduced 02/11/1995
Landline
Pikesville
Verizon Maryland
Introduced 01/25/1998
Landline
Pikesville
Verizon Maryland
Introduced 02/04/1994
Landline
Glen Burnie
Verizon Maryland
Introduced 02/04/1994
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Cockeysville
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 01/25/1998
Landline
Port Republic
Verizon Maryland
Introduced 02/04/1994
Landline
Arbutus
Verizon Maryland
Introduced 02/11/1995
Landline
Bel Air
Verizon Maryland
Introduced 02/11/1995
Landline
Brooklyn
Tw Telecom Of Maryland LLC
Introduced 01/25/1998
Landline
Glen Burnie
Verizon Maryland
Introduced 02/11/1995
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Landline
Fork
Verizon Maryland
Introduced 02/04/1994
Landline
Fork
Verizon Maryland
Introduced 10/11/1997
Landline
Woodlawn
Verizon Maryland
Introduced 02/04/1994
Landline
Laurel
Tw Telecom Of Maryland LLC
Introduced 01/25/1998
Wireless
Westminster
Cellco Partnership DBA Verizon Wireless
Introduced 04/01/1997
Landline
Woodlawn
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 01/10/1996
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 02/11/1995
Landline
Berlin
Sprint Communications Company, L.p.
Introduced 04/25/2006
Landline
Baltimore
Verizon Maryland
Introduced 07/01/1996
Landline
Pikesville
Verizon Maryland
Introduced 02/04/1994
Wireless
Salisbury
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Landline
Stevensville
Verizon Maryland
Introduced 07/01/1996
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Beltsville
Verizon Maryland
Introduced 10/15/1996
Wireless
Towson
Usa Mobility Wireless
Introduced 02/04/1994
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Landline
Brooklyn
Verizon Maryland
Introduced 10/15/1996
Wireless
Prince Frederick
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Landline
Edgewood
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 09/11/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 01/10/1996
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Salisbury
Idt America Corp
Introduced 11/07/2011
Wireless
Laurel
Verizon Maryland
Introduced 01/10/1996
Landline
Elkton
Verizon Maryland
Introduced 02/11/1995
Landline
Princess Anne
Verizon Maryland
Introduced 10/15/1996
Wireless
Salisbury
Mci Worldcom Communications
Introduced 08/12/2011
Landline
Marion
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Annapolis
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 07/04/1995
Landline
Cockeysville
Verizon Maryland
Introduced 02/04/1994
Landline
Berlin
Verizon Maryland
Introduced 01/10/1996
Landline
Baltimore
Mci Worldcom Communications
Introduced 04/01/1997
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Snow Hill
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Ridgely
Verizon Maryland
Introduced 02/04/1994
Landline
New Windsor
Verizon Maryland
Introduced 02/04/1994
Landline
Brooklyn
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Bel Air
Verizon Maryland
Introduced 02/04/1994
Landline
Rock Hall
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Usa Mobility Wireless
Introduced 10/15/1996
Landline
Berlin
Verizon Maryland
Introduced 02/04/1994
Landline
Perryville
Verizon Maryland
Introduced 02/04/1994
Landline
Stevensville
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 01/10/1996
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Severna Park
Verizon Maryland
Introduced 02/04/1994
Landline
Galena
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Teleport Communications America
Introduced 01/10/1996
Landline
Baltimore
Mci Worldcom Communications
Introduced 04/01/1997
Landline
Princess Anne
Verizon Maryland
Introduced 02/04/1994
Wireless
Bel Air
New Cingular Wireless PCS - DC
Introduced 02/11/1995
Landline
Pikesville
Verizon Maryland
Introduced 02/04/1994
Landline
Pikesville
Verizon Maryland
Introduced 09/11/1994
Landline
Randallstown
Verizon Maryland
Introduced 02/04/1994
Landline
North East
Armstrong Telecommunications
Introduced 05/30/2008
Landline
Baltimore
Mci Worldcom Communications
Introduced 01/10/1996
Landline
Rising Sun
Armstrong Telephone Co. Of Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Elkridge
Sprint Spectrum L.p.
Introduced 07/31/2006
Landline
Parkville
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/11/1995
Landline
Parkville
Verizon Maryland
Introduced 07/04/1995
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Parkville
Verizon Maryland
Introduced 02/04/1994
Landline
Cockeysville
Verizon Maryland
Introduced 02/04/1994
Landline
Cockeysville
Verizon Maryland
Introduced 02/04/1994
Landline
Parkville
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Edgewood
Mci Worldcom Communications
Introduced 04/01/1997
Landline
Edgewood
Verizon Maryland
Introduced 02/04/1994
Landline
Odenton
Verizon Maryland
Introduced 02/04/1994
Landline
Preston
Verizon Maryland
Introduced 02/04/1994
Landline
Odenton
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Edgewood
Verizon Maryland
Introduced 02/04/1994
Landline
Salisbury
Verizon Maryland
Introduced 02/04/1994
Wireless
Elkridge
Usa Mobility Wireless
Introduced 02/04/1994
Landline
Edgewood
Verizon Maryland
Introduced 02/04/1994
Landline
Laurel
Tw Telecom Of Maryland LLC
Introduced 01/25/1998
Wireless
Towson
Usa Mobility Wireless
Introduced 10/11/1997
Landline
Essex
Verizon Maryland
Introduced 02/04/1994
Landline
Cockeysville
Verizon Maryland
Introduced 02/04/1994
Landline
Linthicum Heights
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Essex
Verizon Maryland
Introduced 02/04/1994
Landline
Essex
Verizon Maryland
Introduced 02/04/1994
Wireless
Fallston
Cellco Partnership DBA Verizon Wireless
Introduced 05/18/1998
Landline
Baltimore
Teleport Communications America
Introduced 01/10/1996
Landline
Wye Mills
AT&T Local
Introduced 05/20/2002
Landline
Linthicum Heights
Verizon Maryland
Introduced 02/04/1994
Landline
Jarrettsville
Verizon Maryland
Introduced 02/04/1994
Wireless
Annapolis
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Landline
Linthicum Heights
Verizon Maryland
Introduced 10/11/1997
Landline
Odenton
Verizon Maryland
Introduced 04/15/1996
Landline
Baltimore
Mci Worldcom Communications
Introduced 04/01/1997
Landline
Millersville
Mci Worldcom Communications
Introduced 04/01/1997
Landline
Fork
Mci Worldcom Communications
Introduced 04/01/1997
Wireless
Chestertown
Sprint Spectrum L.p.
Introduced 07/23/2002
Landline
Baltimore
Mci Worldcom Communications
Introduced 04/01/1997
Landline
Reisterstown
Mci Worldcom Communications
Introduced 04/01/1997
Wireless
Annapolis
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 04/01/1997
Landline
Beltsville
Verizon Maryland
Introduced 07/01/1996
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Columbia
Cellco Partnership DBA Verizon Wireless
Introduced 04/15/1996
Wireless
Chestertown
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 04/01/1997
Wireless
Baltimore
Omnipoint Communications Cap Operations
Introduced 10/03/2005
Landline
Elkridge
Verizon Maryland
Introduced 02/04/1994
Landline
Salisbury
Level 3 Communications
Introduced 02/09/2003
Wireless
Easton
New Cingular Wireless PCS - DC
Introduced 07/04/1995
Landline
Columbia
Verizon Maryland
Introduced 02/04/1994
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Laurel
Tw Telecom Of Maryland LLC
Introduced 01/25/1998
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 10/15/1996
Landline
Catonsville
Verizon Maryland
Introduced 02/04/1994
Landline
Ellicott City
Verizon Maryland
Introduced 02/04/1994
Landline
Crofton
Verizon Maryland
Introduced 02/04/1994
Landline
Beltsville
Verizon Maryland
Introduced 01/10/1996
Landline
Ocean City
Verizon Maryland
Introduced 02/04/1994
Landline
Laurel
Verizon Maryland
Introduced 07/04/1995
Wireless
Easton
Sprint Spectrum L.p.
Introduced 04/01/1997
Wireless
Salisbury
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Severn
Verizon Maryland
Introduced 01/10/1996
Landline
Columbia
Verizon Maryland
Introduced 02/04/1994
Wireless
Annapolis
Usa Mobility Wireless
Introduced 05/18/1998
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Landline
Churchville
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Cavalier Telephone Mid-atlantic
Introduced 07/06/1997
Landline
Baltimore
Verizon Maryland
Introduced 01/10/1996
Landline
Arbutus
Verizon Maryland
Introduced 09/11/1994
Wireless
Beltsville
Verizon Maryland
Introduced 01/10/1996
Wireless
Centreville
New Cingular Wireless PCS - DC
Introduced 07/04/1995
Landline
Columbia
Verizon Maryland
Introduced 02/04/1994
Landline
North Beach
Verizon Maryland
Introduced 02/04/1994
Landline
Salisbury
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Usa Mobility Wireless
Introduced 07/04/1995
Landline
Catonsville
Verizon Maryland
Introduced 02/04/1994
Landline
Saint Michaels
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 02/11/1995
Landline
Catonsville
Verizon Maryland
Introduced 02/04/1994
Landline
Ellicott City
Usa Mobility Wireless
Introduced 02/04/1994
Landline
Salisbury
Verizon Maryland
Introduced 02/04/1994
Landline
Ellicott City
Verizon Maryland
Introduced 02/04/1994
Landline
Westminster
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 01/10/1996
Landline
Federalsburg
Verizon Maryland
Introduced 02/04/1994
Landline
Warwick
Verizon Maryland
Introduced 02/04/1994
Landline
Taneytown
Verizon Maryland
Introduced 02/04/1994
Landline
Annapolis
Verizon Maryland
Introduced 02/04/1994
Landline
Centreville
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Glen Burnie
Verizon Maryland
Introduced 02/04/1994
Landline
Glen Burnie
Verizon Maryland
Introduced 02/04/1994
Landline
Glen Burnie
Verizon Maryland
Introduced 01/10/1996
Landline
Easton
Verizon Maryland
Introduced 02/11/1995
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Linthicum Heights
Verizon Maryland
Introduced 02/04/1994
Landline
Glen Burnie
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Glen Burnie
Verizon Maryland
Introduced 02/04/1994
Landline
Towson
Verizon Maryland
Introduced 02/11/1995
Landline
Easton
Verizon Maryland
Introduced 10/11/1997
Landline
Cockeysville
Verizon Maryland
Introduced 02/04/1994
Landline
Columbia
Verizon Maryland
Introduced 01/11/1997
Landline
Cockeysville
Verizon Maryland
Introduced 04/01/1997
Landline
Crofton
Mci Worldcom Communications
Introduced 05/18/1998
Landline
Union Bridge
Verizon Maryland
Introduced 02/04/1994
Landline
Bel Air
Teleport Communications America
Introduced 04/01/1997
Landline
Severna Park
Mci Worldcom Communications
Introduced 04/01/1997
Landline
Chestertown
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Level 3 Communications
Introduced 05/18/1998
Landline
Essex
Verizon Maryland
Introduced 02/04/1994
Landline
Sykesville
Verizon Maryland
Introduced 02/04/1994
Landline
Elkridge
Verizon Maryland
Introduced 04/15/1996
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Deal Island
Verizon Maryland
Introduced 02/04/1994
Landline
Cockeysville
Verizon Maryland
Introduced 02/04/1994
Landline
Woodlawn
Verizon Maryland
Introduced 02/11/1995
Landline
Glen Burnie
Verizon Maryland
Introduced 02/04/1994
Landline
Catonsville
Verizon Maryland
Introduced 02/04/1994
Landline
Brooklyn
Verizon Maryland
Introduced 02/04/1994
Wireless
Towson
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Wireless
Beltsville
Verizon Maryland
Introduced 01/10/1996
Landline
Laurel
Verizon Maryland
Introduced 02/04/1994
Landline
Crofton
Verizon Maryland
Introduced 02/04/1994
Landline
Laurel
Tw Telecom Of Maryland LLC
Introduced 07/06/1997
Landline
Sykesville
Verizon Maryland
Introduced 02/04/1994
Landline
Elkridge
Verizon Maryland
Introduced 02/04/1994
Landline
Laurel
Verizon Maryland
Introduced 02/04/1994
Landline
Edgewater
Verizon Maryland
Introduced 02/04/1994
Landline
Elkridge
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 10/05/2004
Wireless
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Landline
Bel Air
Verizon Maryland
Introduced 07/01/1996
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Wireless
Towson
Sprint Spectrum L.p.
Introduced 08/25/2011
Wireless
Towson
Usa Mobility Wireless
Introduced 02/04/1994
Landline
Laurel
Tw Telecom Of Maryland LLC
Introduced 01/25/1998
Wireless
Fallston
Sprint Spectrum L.p.
Introduced 01/25/1998
Landline
Bel Air
Cavalier Telephone (mid-atlantic)
Introduced 08/14/1998
Landline
Chestertown
Verizon Maryland
Introduced 02/04/1994
Wireless
Towson
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Landline
Beltsville
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Cavalier Telephone Mid-atlantic
Introduced 09/30/2005
Wireless
Beltsville
Verizon Maryland
Introduced 07/01/1996
Wireless
Towson
Verizon Maryland
Introduced 04/15/1996
Landline
Fork
Verizon Maryland
Introduced 02/11/1995
Landline
Baltimore
Teleport Communications America
Introduced 01/10/1996
Landline
Easton
Verizon Maryland
Introduced 02/04/1994
Landline
Easton
Verizon Maryland
Introduced 02/04/1994
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Easton
Verizon Maryland
Introduced 02/04/1994
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Laurel
Tw Telecom Of Maryland LLC
Introduced 07/04/1995
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Wireless
Glen Burnie
Verizon Maryland
Introduced 02/11/1995
Landline
Queenstown
Verizon Maryland
Introduced 02/04/1994
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Wireless
Easton
Cellco Partnership DBA Verizon Wireless
Introduced 07/04/1995
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Wireless
Salisbury
Halo Wireless Services
Introduced 12/02/2011
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Reisterstown
Verizon Maryland
Introduced 02/04/1994
Landline
Laurel
Verizon Maryland
Introduced 01/10/1996
Landline
Willards
Verizon Maryland
Introduced 02/04/1994
Landline
Bel Air
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Bel Air
Verizon Maryland
Introduced 02/04/1994
Wireless
Towson
Usa Mobility Wireless
Introduced 01/10/1996
Landline
Westminster
Verizon Maryland
Introduced 02/04/1994
Landline
Annapolis
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 01/10/1996
Landline
Baltimore
Teleport Communications America
Introduced 04/15/1996
Landline
Baltimore
Peerless Network Of Maryland
Introduced 09/30/2011
Wireless
Salisbury
Sprint Spectrum L.p.
Introduced 04/18/2001
Landline
Baltimore
Mci Worldcom Communications
Introduced 04/01/1997
Landline
Towson
Verizon Maryland
Introduced 10/15/1996
Landline
Westminster
Verizon Maryland
Introduced 02/04/1994
Landline
Sherwood Forest
Verizon Maryland
Introduced 02/04/1994
Landline
Linthicum Heights
Verizon Maryland
Introduced 02/04/1994
Wireless
Towson
Verizon Maryland
Introduced 10/11/1997
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 01/25/1998
Landline
Towson
Verizon Maryland
Introduced 04/01/1997
Landline
Odenton
Verizon Maryland
Introduced 11/20/1998
Landline
Linthicum Heights
Verizon Maryland
Introduced 07/04/1995
Landline
Cockeysville
Verizon Maryland
Introduced 02/11/1995
Landline
Westminster
Verizon Maryland
Introduced 02/04/1994
Landline
Annapolis
Verizon Maryland
Introduced 03/11/2005
Landline
Linthicum Heights
Verizon Maryland
Introduced 02/04/1994
Landline
Salisbury
Verizon Maryland
Introduced 02/04/1994
Landline
Reisterstown
Verizon Maryland
Introduced 02/04/1994
Landline
Laurel
Verizon Maryland
Introduced 02/11/1995
Landline
Glen Burnie
Verizon Maryland
Introduced 02/11/1995
Landline
Baltimore
Mci Worldcom Communications
Introduced 07/04/1995
Landline
Linthicum Heights
Verizon Maryland
Introduced 07/01/1996
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
West River
Verizon Maryland
Introduced 02/04/1994
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 02/11/1995
Landline
Catonsville
Verizon Maryland
Introduced 10/15/1996
Landline
Parkville
Comcast Phone Of Northern Maryland
Introduced 02/10/2005
Landline
Westminster
Verizon Maryland
Introduced 01/11/1997
Landline
Columbia
Verizon Maryland
Introduced 02/11/1995
Landline
Nanticoke
Verizon Maryland
Introduced 02/04/1994
Landline
Odenton
Mci Worldcom Communications
Introduced 04/01/1997
Landline
Westminster
Verizon Maryland
Introduced 02/04/1994
Landline
Westminster
Verizon Maryland
Introduced 02/04/1994
Landline
Fallston
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 05/18/1998
Landline
Bel Air
Verizon Maryland
Introduced 02/04/1994
Landline
Laurel
Verizon Maryland
Introduced 02/04/1994
Landline
Sherwood Forest
Mci Worldcom Communications
Introduced 04/01/1997
Landline
Parkville
Verizon Maryland
Introduced 02/04/1994
Landline
Rhodesdale
Verizon Maryland
Introduced 02/04/1994
Landline
Columbia
Verizon Maryland
Introduced 01/10/1996
Landline
Chesapeake City
Verizon Maryland
Introduced 02/04/1994
Landline
Tilghman
Verizon Maryland
Introduced 02/04/1994
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Laurel
Verizon Maryland
Introduced 01/25/1998
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Towson
Usa Mobility Wireless
Introduced 10/11/1997
Landline
Baltimore
Mci Worldcom Communications
Introduced 01/10/1996
Wireless
Linthicum Heights
Verizon Maryland
Introduced 02/04/1994
Landline
Bel Air
Verizon Maryland
Introduced 02/04/1994
Wireless
Towson
Usa Mobility Wireless
Introduced 09/11/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/11/1995
Landline
Delmar
Verizon Maryland
Introduced 02/04/1994
Landline
Annapolis
Verizon Maryland
Introduced 07/06/1997
Landline
Beltsville
Verizon Maryland
Introduced 02/04/1994
Wireless
Towson
Usa Mobility Wireless
Introduced 10/11/1997
Landline
Baltimore
Ctc Communications Corp.
Introduced 10/04/2004
Landline
Cambridge
Verizon Maryland
Introduced 10/15/1996
Landline
Pikesville
Verizon Maryland
Introduced 10/15/1996
Wireless
Baltimore
Sprint Spectrum L.p.
Introduced 10/15/1996
Landline
Baltimore
Mci Worldcom Communications
Introduced 07/01/1996
Wireless
Baltimore
Sprint Spectrum L.p.
Introduced 04/15/1996
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 07/01/1996
Wireless
Baltimore
Sprint Spectrum L.p.
Introduced 07/01/1996
Wireless
Elkridge
Usa Mobility Wireless
Introduced 02/04/1994
Landline
Baltimore
Mci Worldcom Communications
Introduced 07/01/1996
Landline
Salisbury
Cavalier Telephone (mid-atlantic)
Introduced 08/14/1998
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 04/15/1996
Landline
Churchville
Cavalier Telephone (mid-atlantic)
Introduced 08/14/1998
Landline
Baltimore
Baltimore-washington Telephone (bwt)
Introduced 10/27/2005
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 04/01/1997
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Landline
Essex
Verizon Maryland
Introduced 10/15/1996
Landline
Annapolis
Mci Worldcom Communications
Introduced 07/01/1996
Wireless
Elkton
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Landline
Laurel
Tw Telecom Of Maryland LLC
Introduced 01/25/1998
Landline
Randallstown
Verizon Maryland
Introduced 02/04/1994
Landline
Millersville
Verizon Maryland
Introduced 02/04/1994
Wireless
Easton
Cellco Partnership DBA Verizon Wireless
Introduced 02/11/1995
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 04/15/1996
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 10/11/1997
Landline
Laurel
Tw Telecom Of Maryland LLC
Introduced 01/25/1998
Landline
Millington
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Bandwidth.com Clec
Introduced 05/13/2008
Wireless
Baltimore
Redi-call Communications Co
Introduced 01/25/1998
Landline
Parkville
Verizon Maryland
Introduced 02/04/1994
Wireless
Elkridge
Usa Mobility Wireless
Introduced 04/01/1997
Landline
Parkville
Verizon Maryland
Introduced 09/11/1994
Wireless
Annapolis
New Cingular Wireless PCS - DC
Introduced 01/27/2012
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 04/15/1996
Wireless
Fallston
Cellco Partnership DBA Verizon Wireless
Introduced 04/15/1996
Landline
Towson
Verizon Maryland
Introduced 02/04/1994
Landline
Havre De Grace
Verizon Maryland
Introduced 02/04/1994
Landline
Annapolis
Atx Telecommunications Services, Ltd
Introduced 01/22/2002
Landline
Jarrettsville
Verizon Maryland
Introduced 08/21/2001
Landline
Havre De Grace
Verizon Maryland
Introduced 10/11/1997
Landline
Hurlock
Verizon Maryland
Introduced 02/04/1994
Landline
Woodlawn
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Annapolis
Verizon Maryland
Introduced 11/20/1998
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 05/18/1998
Landline
Baltimore
Mci Worldcom Communications
Introduced 05/18/1998
Landline
Baltimore
Teleport Communications America
Introduced 10/15/1996
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 07/04/1995
Landline
Columbia
Verizon Maryland
Introduced 08/14/1998
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Landline
Annapolis
Verizon Maryland
Introduced 02/04/1994
Landline
Pocomoke
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Wireless
Baltimore
Sprint Spectrum L.p.
Introduced 01/25/1998
Landline
Baltimore
Verizon Maryland
Introduced 02/04/1994
Wireless
Baltimore
Sprint Spectrum L.p.
Introduced 01/25/1998
Landline
Columbia
Verizon Maryland
Introduced 02/04/1994
Landline
Woodlawn
Verizon Maryland
Introduced 02/04/1994
Landline
Woodlawn
Verizon Maryland
Introduced 02/04/1994
Wireless
Towson
New Cingular Wireless PCS - DC
Introduced 05/18/1998
Landline
Crisfield
Verizon Maryland
Introduced 02/04/1994
Landline
Severn
Verizon Maryland
Introduced 02/04/1994
Landline
Sykesville
Mci Worldcom Communications
Introduced 05/18/1998
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Landline
Annapolis
Teleport Communications America
Introduced 01/25/1998
Landline
Berlin
Mcc Telephony Of The Mid-atlantic
Introduced 06/23/2010
Landline
Arnold
Verizon Maryland
Introduced 02/04/1994
Landline
Severna Park
Verizon Maryland
Introduced 05/18/1998
Unknown
Baltimore-washington Telephone (bwt)
Introduced 10/13/2005
Wireless
Baltimore
Sprint Spectrum L.p.
Introduced 01/25/1998
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Wireless
Catonsville
New Cingular Wireless PCS - DC
Introduced 02/04/1994
Landline
Annapolis
Cellco Partnership DBA Verizon Wireless
Introduced 05/18/1998
Landline
Linthicum Heights
Verizon Maryland
Introduced 02/27/1999
Landline
Baltimore
Quantum Telecommunications
Introduced 10/13/2003
Landline
Fork
Verizon Maryland
Introduced 01/25/1998
Wireless
Sykesville
Sprint Spectrum L.p.
Introduced 01/25/1998
Landline
Jessup
Baltimore-washington Telephone (bwt)
Introduced 02/13/2002
Landline
Baltimore
Verizon Maryland
Introduced 01/10/1996
Landline
Severn
Verizon Maryland
Introduced 02/04/1994
Landline
Columbia
Verizon Maryland
Introduced 02/04/1994
Landline
Churchville
Verizon Maryland
Introduced 01/25/1998
Landline
Annapolis
Verizon Maryland
Introduced 01/25/1998
Wireless
Annapolis
Cellco Partnership DBA Verizon Wireless
Introduced 02/04/1994
Landline
Columbia
Verizon Maryland
Introduced 02/04/1994
Landline
Linthicum Heights
Verizon Maryland
Introduced 02/04/1994
Landline
Aberdeen
Verizon Maryland
Introduced 02/11/1995
Landline
Ellicott City
Verizon Maryland
Introduced 02/04/1994
Landline
Port Deposit
Verizon Maryland
Introduced 02/04/1994
Landline
Columbia
Verizon Maryland
Introduced 02/04/1994
Landline
Pikesville
Verizon Maryland
Introduced 02/04/1994
Landline
Baltimore
Baltimore-washington Telephone (bwt)
Introduced 06/09/2003

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