Area Code 240

Country United States
State/Province Maryland 
Major City Bethesda 
Easy URL 

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240 Area Code is an area code finder with detailed information on the 240 area code including 240 area code map.

Major cities like Aspen Hill within area code 240 are also listed on this page. More area codes, including those outside of Maryland, are found on the homepage.

Some telephone area codes are overlaid, requiring 10-digit dialing. is your one-stop site for area code lookup, area code search, and area code locator.

Area Code 240 Detail

Area code 240 serves parts of Maryland, including Cumberland, Frederick, Hagerstown, and Gaithersburg. It was created in 1997 as an overlay to area code 301.

240 Area Code Location
Major Cities County State/Province
Aspen Hill  Montgomery  MD 
Bethesda  Montgomery  MD 
Frederick  Frederick  MD 
Other Cities By Name
Buckeystown  Frederick  MD 
Cumberland  Allegany  MD 
Damascus  Montgomery  MD 
Emmitsburg  Frederick  MD 
Frostburg  Allegany  MD 
Gaithersburg  Montgomery  MD 
Grantsville  Garrett  MD 
Hagerstown  Washington  MD 
Hancock  Washington  MD 
Highfield  Washington  MD 
Hughesville  Charles  MD 
Indian Head  Charles  MD 
La Plata  Charles  MD 
Laurel  Anne Arundel
Leonardtown  St. Mary's  MD 
Mccoole  Allegany  MD 
Mechanicsville  St. Mary's  MD 
Middletown  Frederick  MD 
Mount Airy  Frederick  MD 
Myersville  Frederick  MD 
Nanjemoy  Charles  MD 
Oakland  Garrett  MD 
Poolesville  Montgomery  MD 
Ridge  St. Mary's  MD 
Thurmont  Frederick  MD 
Waldorf  Charles  MD 
Williamsport  Washington  MD 

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