Zip Area Code

Mount Aetna, Maryland

No ZIP code carries the name of Mount Aetna, Maryland, in Washington County; the nearest ZIP codes are 21734 and 21783, in area code 301, with overlays 227 and 240.

Nearest ZIP
21734, 21783
Area codes
301, 227, 240
Time zone
Eastern Time
Coordinates
39.5989, -77.6128

Nearest ZIP codes to Mount Aetna

These are the ZIP codes nearest to Mount Aetna, each listed with the post office it is named after.

ZIP codePost officeCountyArea codes
21734FunkstownWashington County301, 227, 240
21783SmithsburgWashington County301, 227, 240

Area codes for Mount Aetna

  • 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

Mount Aetna is in the Eastern Time zone.

Towns near Mount Aetna