Longmont, Colorado

ZIP codes in Longmont

Area codes for Longmont

• 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 code 970

  In service since April 2, 1995. Shares its area with 748. Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

• Area code 748

  In service since July 7, 2025. Shares its area with 970. 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

Longmont is in the Mountain Time zone.

Towns near Longmont

• Niwot9.9 km (6.2 mi)
• Mead10.9 km (6.8 mi)
• Erie11 km (6.8 mi)
• Leyner12.1 km (7.5 mi)
• Firestone13.1 km (8.1 mi)
• Gunbarrel13.2 km (8.2 mi)
• Hygiene13.3 km (8.3 mi)
• Frederick14.4 km (8.9 mi)