Zip Area Code

Oldtown, Maryland

Oldtown, Maryland, in Allegany County, has ZIP code 21555 and area code 301, with overlays 227 and 240.

ZIP code
21555
Area codes
301, 227, 240
County
Allegany County
State
Maryland
Time zone
Eastern Time
Coordinates
39.5846, -78.6044

ZIP codes in Oldtown

ZIP codePost officeCountyArea codes
21555OldtownAllegany County301, 227, 240

Area codes for Oldtown

  • Area code 301

    In service since 1947. Shares its area with 227 and 240. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

  • Area code 227

    In service since June 14, 2023. Shares its area with 240 and 301. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

  • Area code 240

    In service since June 1, 1997. Shares its area with 227 and 301. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

Area codes here are matched from telephone rate centers, so a place near a boundary can have local numbers from either side of it.

Time zone

Oldtown is in the Eastern Time zone.

Towns near Oldtown

Local numbers in area code 301

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