Maryland Area Codes

Major City: Annapolis

  • Admission to Statehood:
    April 28, 1788 (7th State)
  • Constitution:
    Maryland's Constitution , 7th State
  • Nickname:
    Old Line State
  • Population (2013):
    5,928,814; Rank: 19 of 50 | Population Quick Facts
  • Area:
    • Area: 12,407 sq.mi (32,134 sq.km.), 42nd
    • Land: 9,775 sq.mi. (25,317 sq.km.), 42nd
    • Water: 2,633 sq.mi. (6,819 sq.km.), 18th
    • Coastline: 31 mi. (50 km.), 20th
    • Shoreline: 3,190 mi. (5,134 km.), 9th

Area Codes Maryland

Map:

Usage:
Area codes:
Area Code Prefix Usage Primary City Carrier Introduced
240 (240) 200- Landline Mount Rainier Bandwidth.com Clec 10/04/2010
240 (240) 201- Landline Ridge Peerless Network Of The District Of Columbia, Dc 07/22/1999
240 (240) 203- Wireless Hagerstown Sprint Spectrum L.p. 10/04/2011
240 (240) 204- Wireless Bethesda Cellco Partnership DBA Verizon Wireless 09/07/2011
240 (240) 205- Wireless Cabin John New Cingular Wireless PCS - DC 07/23/2003
240 (240) 206- Landline Glenn Dale Xo Maryland 10/31/2001
240 (240) 207- Landline Damascus Cavalier East LLC 08/20/2000
240 (240) 208- Landline La Plata Peerless Network Of The District Of Columbia, Dc 07/22/1999
240 (240) 209- Landline Indian Head Peerless Network Of The District Of Columbia, Dc 07/22/1999
240 (240) 210- Wireless Waldorf New Cingular Wireless PCS - DC 08/20/2000
240 (240) 212- Landline Oakland Core Communications 06/13/2000
240 (240) 213- Landline Waldorf Peerless Network Of The District Of Columbia, Dc 07/22/1999
240 (240) 214- Landline Mechanicsville Peerless Network Of The District Of Columbia, Dc 07/22/1999
240 (240) 215- Landline Frederick Telcove Operations 01/14/2000
240 (240) 216- Wireless Waldorf Sprint Spectrum L.p. 03/15/2001
240 (240) 217- Wireless Hagerstown Omnipoint Communications Cap Operations 04/16/2001
240 (240) 218- Landline Nanjemoy Peerless Network Of The District Of Columbia, Dc 02/27/1999
240 (240) 220- Landline Poolesville Peerless Network Of Maryland 02/27/1999
240 (240) 221- Landline Rockville Verizon Maryland 05/10/1999
240 (240) 222- Landline Waldorf Cavalier Telephone Mid-atlantic 08/20/2000
240 (240) 223- Landline Mount Rainier Allegiance Telecom 02/27/1999
240 (240) 224- Wireless Gaithersburg Cellco Partnership DBA Verizon Wireless 09/10/2012
240 (240) 225- Landline Frederick Core Communications 06/13/2000
240 (240) 228- Landline Laurel Verizon Maryland 11/20/1998
240 (240) 229- Landline Waldorf Broadwing Communications. LLC 07/22/1999
240 (240) 230- Landline Hughesville Global Crossing Local Services-md 05/10/1999
240 (240) 231- Landline Hagerstown Core Communications 06/13/2000
240 (240) 232- Landline Mount Rainier Broadwing Communications. LLC 07/22/1999
240 (240) 233- Landline Newburg Teleport Communications America - DC 02/27/1999
240 (240) 234- Wireless Mount Rainier Cellco Partnership DBA Verizon Wireless 10/04/2011
240 (240) 235- Landline Bethesda Paetec Communications 10/13/1999
240 (240) 236- Landline Frederick Verizon Maryland 06/13/2000
240 (240) 237- Landline Callaway Teleport Communications America - DC 02/27/1999
240 (240) 238- Landline Rockville Paetec Communications 10/13/1999
240 (240) 239- Landline Leonardtown Core Communications 10/31/2000
240 (240) 241- Landline Chevy Chase Starpower Communications 02/27/1999
240 (240) 242- Landline Kensington Starpower Communications 02/27/1999
240 (240) 243- Landline Gaithersburg Allegiance Telecom 01/14/2000
240 (240) 244- Landline Mount Rainier Starpower Communications 02/27/1999
240 (240) 245- Landline Glenn Dale Starpower Communications 02/27/1999
240 (240) 246- Landline Gaithersburg Starpower Communications 11/20/1998
240 (240) 247- Landline Mount Rainier Allegiance Telecom 02/27/1999
240 (240) 248- Landline Ridge Peerless Network Of Maryland 02/27/1999
240 (240) 249- Landline Mechanicsville Teleport Communications America - DC 02/27/1999
240 (240) 250- Landline Brandywine Peerless Network Of Maryland 02/27/1999
240 (240) 251- Landline Highfield Core Communications 06/13/2000
240 (240) 252- Landline Gaithersburg Level 3 Communications 05/10/1999
240 (240) 253- Landline Mount Rainier Global Crossing Local Services-md 02/27/1999
240 (240) 254- Landline Hughesville Teleport Communications America - DC 02/27/1999
240 (240) 255- Landline Poolesville Peerless Network Of Maryland 07/22/1999
Area Code: 240
Prefix: (240) 200-
Usage: Landline
Primary City: Mount Rainier
Carrier: Bandwidth.com Clec
Introduced: 10/04/2010
Area Code: 240
Prefix: (240) 201-
Usage: Landline
Primary City: Ridge
Carrier: Peerless Network Of The District Of Columbia, Dc
Introduced: 07/22/1999
Area Code: 240
Prefix: (240) 203-
Usage: Wireless
Primary City: Hagerstown
Carrier: Sprint Spectrum L.p.
Introduced: 10/04/2011
Area Code: 240
Prefix: (240) 204-
Usage: Wireless
Primary City: Bethesda
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 09/07/2011
Area Code: 240
Prefix: (240) 205-
Usage: Wireless
Primary City: Cabin John
Carrier: New Cingular Wireless PCS - DC
Introduced: 07/23/2003
Area Code: 240
Prefix: (240) 206-
Usage: Landline
Primary City: Glenn Dale
Carrier: Xo Maryland
Introduced: 10/31/2001
Area Code: 240
Prefix: (240) 207-
Usage: Landline
Primary City: Damascus
Carrier: Cavalier East LLC
Introduced: 08/20/2000
Area Code: 240
Prefix: (240) 208-
Usage: Landline
Primary City: La Plata
Carrier: Peerless Network Of The District Of Columbia, Dc
Introduced: 07/22/1999
Area Code: 240
Prefix: (240) 209-
Usage: Landline
Primary City: Indian Head
Carrier: Peerless Network Of The District Of Columbia, Dc
Introduced: 07/22/1999
Area Code: 240
Prefix: (240) 210-
Usage: Wireless
Primary City: Waldorf
Carrier: New Cingular Wireless PCS - DC
Introduced: 08/20/2000
Area Code: 240
Prefix: (240) 212-
Usage: Landline
Primary City: Oakland
Carrier: Core Communications
Introduced: 06/13/2000
Area Code: 240
Prefix: (240) 213-
Usage: Landline
Primary City: Waldorf
Carrier: Peerless Network Of The District Of Columbia, Dc
Introduced: 07/22/1999
Area Code: 240
Prefix: (240) 214-
Usage: Landline
Primary City: Mechanicsville
Carrier: Peerless Network Of The District Of Columbia, Dc
Introduced: 07/22/1999
Area Code: 240
Prefix: (240) 215-
Usage: Landline
Primary City: Frederick
Carrier: Telcove Operations
Introduced: 01/14/2000
Area Code: 240
Prefix: (240) 216-
Usage: Wireless
Primary City: Waldorf
Carrier: Sprint Spectrum L.p.
Introduced: 03/15/2001
Area Code: 240
Prefix: (240) 217-
Usage: Wireless
Primary City: Hagerstown
Carrier: Omnipoint Communications Cap Operations
Introduced: 04/16/2001
Area Code: 240
Prefix: (240) 218-
Usage: Landline
Primary City: Nanjemoy
Carrier: Peerless Network Of The District Of Columbia, Dc
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 220-
Usage: Landline
Primary City: Poolesville
Carrier: Peerless Network Of Maryland
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 221-
Usage: Landline
Primary City: Rockville
Carrier: Verizon Maryland
Introduced: 05/10/1999
Area Code: 240
Prefix: (240) 222-
Usage: Landline
Primary City: Waldorf
Carrier: Cavalier Telephone Mid-atlantic
Introduced: 08/20/2000
Area Code: 240
Prefix: (240) 223-
Usage: Landline
Primary City: Mount Rainier
Carrier: Allegiance Telecom
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 224-
Usage: Wireless
Primary City: Gaithersburg
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 09/10/2012
Area Code: 240
Prefix: (240) 225-
Usage: Landline
Primary City: Frederick
Carrier: Core Communications
Introduced: 06/13/2000
Area Code: 240
Prefix: (240) 228-
Usage: Landline
Primary City: Laurel
Carrier: Verizon Maryland
Introduced: 11/20/1998
Area Code: 240
Prefix: (240) 229-
Usage: Landline
Primary City: Waldorf
Carrier: Broadwing Communications. LLC
Introduced: 07/22/1999
Area Code: 240
Prefix: (240) 230-
Usage: Landline
Primary City: Hughesville
Carrier: Global Crossing Local Services-md
Introduced: 05/10/1999
Area Code: 240
Prefix: (240) 231-
Usage: Landline
Primary City: Hagerstown
Carrier: Core Communications
Introduced: 06/13/2000
Area Code: 240
Prefix: (240) 232-
Usage: Landline
Primary City: Mount Rainier
Carrier: Broadwing Communications. LLC
Introduced: 07/22/1999
Area Code: 240
Prefix: (240) 233-
Usage: Landline
Primary City: Newburg
Carrier: Teleport Communications America - DC
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 234-
Usage: Wireless
Primary City: Mount Rainier
Carrier: Cellco Partnership DBA Verizon Wireless
Introduced: 10/04/2011
Area Code: 240
Prefix: (240) 235-
Usage: Landline
Primary City: Bethesda
Carrier: Paetec Communications
Introduced: 10/13/1999
Area Code: 240
Prefix: (240) 236-
Usage: Landline
Primary City: Frederick
Carrier: Verizon Maryland
Introduced: 06/13/2000
Area Code: 240
Prefix: (240) 237-
Usage: Landline
Primary City: Callaway
Carrier: Teleport Communications America - DC
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 238-
Usage: Landline
Primary City: Rockville
Carrier: Paetec Communications
Introduced: 10/13/1999
Area Code: 240
Prefix: (240) 239-
Usage: Landline
Primary City: Leonardtown
Carrier: Core Communications
Introduced: 10/31/2000
Area Code: 240
Prefix: (240) 241-
Usage: Landline
Primary City: Chevy Chase
Carrier: Starpower Communications
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 242-
Usage: Landline
Primary City: Kensington
Carrier: Starpower Communications
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 243-
Usage: Landline
Primary City: Gaithersburg
Carrier: Allegiance Telecom
Introduced: 01/14/2000
Area Code: 240
Prefix: (240) 244-
Usage: Landline
Primary City: Mount Rainier
Carrier: Starpower Communications
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 245-
Usage: Landline
Primary City: Glenn Dale
Carrier: Starpower Communications
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 246-
Usage: Landline
Primary City: Gaithersburg
Carrier: Starpower Communications
Introduced: 11/20/1998
Area Code: 240
Prefix: (240) 247-
Usage: Landline
Primary City: Mount Rainier
Carrier: Allegiance Telecom
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 248-
Usage: Landline
Primary City: Ridge
Carrier: Peerless Network Of Maryland
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 249-
Usage: Landline
Primary City: Mechanicsville
Carrier: Teleport Communications America - DC
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 250-
Usage: Landline
Primary City: Brandywine
Carrier: Peerless Network Of Maryland
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 251-
Usage: Landline
Primary City: Highfield
Carrier: Core Communications
Introduced: 06/13/2000
Area Code: 240
Prefix: (240) 252-
Usage: Landline
Primary City: Gaithersburg
Carrier: Level 3 Communications
Introduced: 05/10/1999
Area Code: 240
Prefix: (240) 253-
Usage: Landline
Primary City: Mount Rainier
Carrier: Global Crossing Local Services-md
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 254-
Usage: Landline
Primary City: Hughesville
Carrier: Teleport Communications America - DC
Introduced: 02/27/1999
Area Code: 240
Prefix: (240) 255-
Usage: Landline
Primary City: Poolesville
Carrier: Peerless Network Of Maryland
Introduced: 07/22/1999