Area Code 303 — Colorado
Area code 303 is located in Colorado and operates on Mountain Time . The largest city served is Denver .
Coverage Area
Area code 303 — ColoradoArea Code Details
- Area Code
- 303
- 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
- January 1, 1947
- Assigned
- January 1, 1947
- Population Served
- ~736,841 est.
- Overlay Complex
- 303/720/983
Cities Served
History & Relationships
New codes split from 303
Overlay complex — shares geography with
Rate Centers & Exchanges
4 rate centers identified within area code 303
Other Area Codes in Colorado
View all →Nearby Area Codes
Frequently Asked Questions About Area Code 303
What state is area code 303?
Area code 303 is located in Colorado, United States.
Where is area code 303 from?
Area code 303 originates from Colorado. It operates in the Mountain Time zone.
What time zone is area code 303?
Area code 303 falls within the Mountain Time zone (Mountain Time).
What cities are in area code 303?
Area code 303 serves cities including Denver, Fort Lupton, Hudson, Georgetown.
Is a call from area code 303 a scam?
Area code 303 is a legitimate general purpose code area code serving Colorado. Like any area code, individual numbers using 303 can be used for scam calls — always verify the specific number if you receive an unexpected or suspicious call.