Rosemont, Maryland

Nearest ZIP codes to Rosemont

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

Area codes for Rosemont

• 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

Rosemont is in the Eastern Time zone.

Towns near Rosemont

• Brunswick1.9 km (1.2 mi)
• Knoxville2.9 km (1.8 mi)
• Garretts Mill6.1 km (3.8 mi)
• Burkittsville6.5 km (4.0 mi)
• Brownsville6.6 km (4.1 mi)
• Yarrowsburg7.1 km (4.4 mi)
• Sandy Hook7.1 km (4.4 mi)
• Jefferson7.6 km (4.7 mi)