303 Area Code Phone Numbers – Denver
Get a local 303 phone number for Denver. Search available 303, 720 and 983 numbers, pick one you'll remember, and pay a one-time price — 20% off every number.
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Where is the 303 area code?
The 303 area code covers Denver, Boulder, Aurora and the surrounding Front Range metro in Colorado.
303 is Colorado's original area code and is still the one most associated with Denver. 720 and 983 now share the same area, giving you more options for a memorable number.
Overlay area codes for 303
720 (1998) and 983 (added more recently) overlay 303 across the Denver–Boulder metro. All are local numbers.
Nearby area codes
Why get a 303 number?
A local area code tells callers you're part of their community, and it makes customers more likely to pick up and call back. Whether you need a second line for your business, a number for a side project, or a fresh personal number, a 303 number keeps you local to Denver.
Want something easier to remember? On Browse Numbers you can filter 303 numbers for repeating digits, sequences like 1234 and mirror patterns — see Number Patterns for ideas. If you care about meaning, each number also shows an optional Thai and Chinese reading.
303 phone number questions
Can I get a 303 number if I don't live in Denver?
Yes. Many people choose an area code from a city where they work, grew up or have customers. Whether your carrier accepts a specific number is confirmed during the transfer — if you're unsure, ask us before you buy.
Do I need to dial the area code for local calls?
Yes. Because 303 shares its territory with 720 and 983, local calls in the area are dialed with all ten digits.
How do I start using my new 303 number?
After checkout we send the details you need to transfer the number to a compatible carrier. The full steps are in our Porting Guide.
Looking for a different city? See the full U.S. Area Code Guide.