Adelphi, Maryland

Nearest ZIP codes to Adelphi

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

Area codes for Adelphi

• 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

Adelphi is in the Eastern Time zone.

Towns near Adelphi

• Langley Park1.5 km (0.9 mi)
• Hillandale3.3 km (2.1 mi)
• University Park3.4 km (2.1 mi)
• Chillum3.5 km (2.2 mi)
• Takoma Park3.7 km (2.3 mi)
• Hyattsville4.4 km (2.7 mi)
• Berwyn Heights4.6 km (2.9 mi)
• Four Corners4.8 km (3.0 mi)