Zip Area Code

Area code 720

Area code 720 is a Colorado area code, in service since June 1, 1998.

It was added as an overlay on 303: both codes serve the same area, so neighbors can have numbers in either one.

983 serves the same area too.

Local calls are dialed with ten digits; dialing 1 plus ten digits also works.

It is in the Mountain Time zone.

In service since
June 1, 1998
Overlays
303, 983
Local dialing
ten digits; dialing 1 plus ten digits also works
Time zone
Mountain Time
ZIP codes
146

Map

Map of the 720 area codeThe shaded area shows where 720 numbers are rated, with the neighboring area codes outlined around it.970719DenverLongmontDeckersKeenesburgGeorgetownByers
Approximate 720 coverage, drawn from U.S. Census ZIP code areas and NANPA rate centers. Dashed lines are state borders.

Main cities in area code 720

Overlays and neighboring area codes

Overlays, serving the same area: 303, 983.

Neighboring area codes: 970, 719.

Counties in area code 720

Towns in area code 720

And 88 more towns: every town in Colorado.