Area Code 720 — Colorado

Active General Purpose Code Overlay United States

Area code 720 is located in Colorado and operates on Mountain Time . The largest city served is Denver .

Coverage Area

Area code 720 — Colorado

Area Code Details

Area Code: 720
State / Province: Colorado (CO)
Country: United States
Time Zone: Mountain Time Mountain Time
Local Time Now: —
Status: Active
Code Type: General Purpose Code
In Service Since: June 1, 1998
Assigned: March 3, 1998
Population Served: ~821,107 est.
Overlay Complex: 303/720/983

Cities Served

Largest City Denver

Denver Longmont Keenesburg Hudson Deckers

History & Relationships

Split from

Overlay complex — shares geography with

303 Colorado 983 Colorado

Rate Centers & Exchanges

5 rate centers identified within area code 720

View exchanges →

Other Area Codes in Colorado

Nearby Area Codes

Frequently Asked Questions About Area Code 720

What state is area code 720?

Area code 720 is located in Colorado, United States.

Where is area code 720 from?

Area code 720 originates from Colorado. It operates in the Mountain Time zone.

What time zone is area code 720?

Area code 720 falls within the Mountain Time zone (Mountain Time).

What cities are in area code 720?

Area code 720 serves cities including Denver, Longmont, Keenesburg, Hudson, Deckers.

Is a call from area code 720 a scam?

Area code 720 is a legitimate general purpose code area code serving Colorado. Like any area code, individual numbers using 720 can be used for scam calls — always verify the specific number if you receive an unexpected or suspicious call.