Area code 303: where is it from? Colorado
Area code 303 belongs to Colorado (United States).
- Type
- Landline / geographic
- Region
- Colorado
- Local time now
- —
- How to dial from abroad
- +1 303 XXX XXXX
- Numbers with reports
- 0
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Places using area code 303
Denver, Boulder, Longmont, Aurora, Golden, Limon, Littleton, Centennial; central Colorado
Area code 303 serves Colorado: Colorado (Denver, Boulder, Longmont, Aurora, Golden, Limon, Littleton, Centennial; central Colorado). In service since 1947.
Reported numbers starting with 303
No reports yet for numbers starting with 303. If you got a call, look up the full number and share your experience.
Frequently asked questions
Where is area code 303 from?
Area code 303 belongs to Colorado (United States).
How do I call a number with area code 303 from another country?
Dial the country code followed by the full number, like this: +1 303 XXX XXXX. On a mobile phone you can use + instead of the international exit code.
Why am I getting calls from area code 303 if I know nobody there?
An area code shows where the number was assigned, not where the caller is. Telemarketers and scammers use virtual or ported numbers and can even spoof the number shown on screen. Look up the full number to see what other users say before calling back.