240 Area Code Data

Area code 240 has a total estimated population of 1,099,586 people and covers the following localities in Maryland:

  • Annapolis
  • Beltsville
  • Bethesda
  • Bowie
  • Braddock Heights
  • Brandywine
  • Buckeystown
  • Cascade
  • Chevy Chase
  • Clarksville
  • Clinton
  • College Park
  • Columbia
  • Cumberland
  • Damascus
  • Emmitsburg
  • Frederick
  • Frostburg
  • Gaithersburg
  • Grantsville
  • Hagerstown
  • Hughesville
  • Hyattsville
  • Indian Head
  • Keyser
  • La Plata
  • Laurel
  • Leonardtown
  • Lexington Park
  • Mechanicsville
  • Mount Airy
  • Myersville
  • Nanjemoy
  • Newburg
  • Oakland
  • Odenton
  • Poolesville
  • Ridge
  • Rockville
  • Silver Spring
  • Smithsburg
  • Thurmont
  • Upper Marlboro
  • Waldorf
  • Washington
  • Williamsport

The (240) area code is comprised of 493 unique phone exchanges: