Zip Area Code

Area code 240

Area code 240 is a Maryland area code, in service since June 1, 1997.

It was added as an overlay on 301: both codes serve the same area, so neighbors can have numbers in either one.

227 serves the same area too.

Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

It is in the Eastern Time zone.

In service since
June 1, 1997
Overlays
227, 301
Local dialing
ten digits; dialing 1 plus ten digits also works
Time zone
Eastern Time
ZIP codes
202

Map

Map of the 240 area codeThe shaded area shows where 240 numbers are rated, with the neighboring area codes outlined around it.434540703804410814724304610717BethesdaWaldorfAllentownFrederickGermantownHagerstownCumberlandLeonardtown
Approximate 240 coverage, drawn from U.S. Census ZIP code areas and NANPA rate centers. Dashed lines are state borders.

Main cities in area code 240

Overlays and neighboring area codes

Overlays, serving the same area: 227, 301.

Neighboring area codes: 434, 540, 703, 757, 804, 410, 814, 724, 304, 610, 717, 302, 202.

Counties in area code 240

Towns in area code 240

And 309 more towns: every town in Maryland.