Altona, Colorado

Nearest ZIP codes to Altona

This is the ZIP code nearest to Altona, each listed with the post office it is named after.

Area codes for Altona

• Area code 303

  In service since 1947. Shares its area with 720 and 983. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

• Area code 720

  In service since June 1, 1998. Shares its area with 303 and 983. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

• Area code 983

  In service since June 17, 2022. Shares its area with 303 and 720. 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

Altona is in the Mountain Time zone.

Towns near Altona

• Lazy Acres5.2 km (3.2 mi)
• Jamestown7.9 km (4.9 mi)
• Hygiene8.5 km (5.3 mi)
• Sunshine9 km (5.6 mi)
• Pine Brook Hill9.3 km (5.8 mi)
• Boulder9.4 km (5.8 mi)
• Seven Hills10.2 km (6.3 mi)
• Niwot10.8 km (6.7 mi)