Where is area code 303?
Area code 303 serves Denver, CO. It was established in 1950.
Major Cities in Area Code 303
The 303 area code covers Denver, CO. Major cities and communities include:
- Denver
- Boulder
- Golden
- Lakewood
- Arvada
History of Area Code 303
Area code 303 was established in 1950 and serves Denver, CO.
Nearby Area Codes
Related area codes near 303:
Common 303 Scam Patterns
Government Impersonation
Scammers pretending to be from IRS, Social Security, or local authorities
Common prefixes: 800, 888, 877
- Threatening immediate arrest
- Demanding immediate payment
- Requesting gift cards or wire transfers
Auto Warranty Scams
Automated calls about extended car warranties
Common prefixes: 833, 844, 855
- Pre-recorded messages
- Urgent warranty expiration claims
- Pressure to provide vehicle information
Tech Support Fraud
Fake technical support calls claiming computer problems
Common prefixes: 866, 877, 888
- Claims of detected viruses
- Requests for remote computer access
- Microsoft/Apple impersonation
Legitimate Callers From 303
Government
Utilities
- — Service and billing notifications
Healthcare
- — Appointment reminders and follow-ups
Denver, CO Authorities & Reporting
- Police: Denver Police Department: (303) 446-5261
- Consumer protection: Colorado Attorney General's Office: (303) 866-5200
- Fraud unit: Denver Police Department Fraud Investigation Unit: (303) 296-0161
- Emergency: 911, Denver Health Paramedics: (303) 698-7731, Denver Fire Department: (303) 892-1000
Immediate steps if you suspect a scam:
- Document the call details
- Report to FTC at ftc.gov/complaint
- Contact local authorities
- Alert your bank if needed
Frequently Asked Questions
Where is the 303 area code?
The 303 area code serves Denver, CO. Major cities include Denver, Boulder, Golden, Lakewood, Arvada. It was established in 1950.
Is the 303 area code a scam?
The 303 area code itself is legitimate — it covers Denver, CO. But scammers spoof local numbers: 4,639 scams were reported in 2023, with common types including utility 37%, government 23%, banking 33%, other 22%. Always verify unknown callers.
What time zone is area code 303?
Area code 303 is in the Mountain Time (MT).
How do I report a scam call from 303?
Report scam calls to the FTC at reportfraud.ftc.gov, the FCC, and Colorado Attorney General's Office: (303) 866-5200. For Denver, CO, contact Denver Police Department Fraud Investigation Unit: (303) 296-0161 to file a complaint.
How can I protect myself from 303 area code spam calls?
Block unknown numbers, use caller ID / spam-blocking apps, never share personal info with unsolicited callers, and verify callers through official channels. CyberForget's phone tools help check whether a number is linked to known scams.
Worried about a call from 303?
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