Glassmanor, Maryland

Nearest ZIP codes to Glassmanor

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

Area codes for Glassmanor

• 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

Glassmanor is in the Eastern Time zone.

Towns near Glassmanor

• Oxon Hill1.4 km (0.9 mi)
• Hillcrest Heights2.3 km (1.4 mi)
• Forest Heights2.9 km (1.8 mi)
• Temple Hills3.2 km (2.0 mi)
• Marlow Heights3.4 km (2.1 mi)
• National Harbor4.4 km (2.7 mi)
• Silver Hill4.6 km (2.9 mi)
• Fort Washington5.2 km (3.2 mi)