240
Maryland (MD)
By Area Code
By State
All
200
300
400
500
600
700
800
900
Cities Covered by
240
Area Code
Westernport
Elkridge
Ijamsville
Brandywine
Woodsboro
Clarksburg
Bowie
Williamsport
New Market
Walkersville
Leonardtown
Annapolis
Monrovia
Mechanicsville
Halethorpe
Cascade
Jessup
Hughesville
Lothian
Sabillasville
Odenton
Hancock
Frostburg
Riverdale
District Heights
Andrews Air Force Base
Prince Frederick
Suitland
Damascus
Ashton
Greenbelt
College Park
Mount Rainier
Rawlings
Upper Marlboro
Laurel
Emmitsburg
Bel Alton
Thurmont
Temple Hills
Bryans Road
Fort Washington
Germantown
Silver Spring
Myersville
Nanjemoy
Faulkner
Derwood
Hagerstown
Libertytown
Brunswick
Cumberland
Ridge
Issue
Grantsville
Callaway
La Plata
Smithsburg
Potomac
Savage
Crofton
Takoma Park
Oxon Hill
Shady Side
Patuxent River
Rockville
Lanham
Gaithersburg
Hyattsville
Montgomery Village
Clinton
Lexington Park
Frederick
Indian Head
Oakland
Middletown
Great Mills
Bethesda
Poolesville
Cheltenham
Kensington
Brentwood
Columbia
Chevy Chase
Waldorf
Sandy Spring
Port Tobacco
Mount Airy
California
Related Area Codes
202
,
240
,
301
,
410
,
443
,
703
,
304