A local number. A little more freedom.
Get a 303
phone number.
A local number for Denver, CO. Call and text over WiFi or mobile data, on the phone you already have.
- Calls and texts
- No extra SIM
- Location
- Denver, Colorado
- Time zone
- Mountain (GMT -7)
Where is area code 303 located?
Area code 303 is a Colorado area code, serving Denver, CO and nearby cities including Aurora, Thornton, Westminster. It is in the Mountain (GMT -7) time zone.
Who is calling from area code 303?
A 303 call comes from a number assigned to the Denver, CO area, which can be a mobile, a landline or an app-based number like AvoCall's. Caller ID can be faked from any area code, so if you don't know the number, let it go to voicemail and never share a code you didn't ask for.
How do I get a 303 phone number?
Pick an available 303 number and sign up for AvoCall. Your new Denver, CO number works for calls and texts on your existing phone over WiFi or data. No second SIM is needed. Right now 20 numbers in the 303 area code are available on this page (checked October 11, 2026 at 8:26 AM UTC).
Find one that feels like yours
Choose a 303 number
20 numbers listed · Checked October 11, 2026 at 8:26 AM UTC.
- (303) 243-2413Denver, CO
- (720) 640-1012Hudson, CO
- (720) 832-8047Hudson, CO
- (720) 571-0599Allenspark-Lyons, CO
- (720) 712-9224Fort Lupton, CO
- (720) 640-1996Hudson, CO
- (720) 735-8599Keenesburg, CO
- (720) 698-9370Longmont, CO
- (720) 572-1730Denver, CO
- (720) 743-9567Longmont, CO
- (720) 743-9120Longmont, CO
- (720) 664-0151Allenspark-Lyons, CO
- (720) 806-8873Deckers, CO
- (720) 697-1167Denver, CO
- (720) 743-9082Longmont, CO
- (720) 698-9929Longmont, CO
- (720) 856-5724Fort Lupton, CO
- (720) 664-0732Allenspark-Lyons, CO
- (720) 856-5485Fort Lupton, CO
- (720) 797-7248Keenesburg, CO
Every number requires an AvoCall plan. Current web pricing is verified at checkout, and number availability changes often.
About the 303 area code
Denver, Colorado, is the center of area code 303, which also serves Aurora, Thornton, Westminster, Commerce City, and Brighton, all on Mountain time.
First assigned in 1947 among the earliest codes, 303 has since produced 719 and 970 through splits, while 720 and later 983 were layered over its remaining ground as overlays. Local dialing across the complex uses ten digits.
Dialing note: 303 is part of an overlay complex with 720, 983, so local calls in this area are dialed with all ten digits.
Numbering details on this page (service dates and overlay status) are checked against the NANPA numbering registry. Registry data as of 10/08/2026.
303 phone number FAQ
- Can I receive verification codes on a 303 number?
- AvoCall 303 numbers support calling and messaging. Verification-text compatibility varies by sender; short-code and 2FA delivery is not guaranteed.
- Which 303 numbers are available right now?
- As of October 11, 2026 at 8:26 AM UTC, 20 303 numbers were available to claim on this page. Inventory is re-checked hourly and changes as numbers are claimed, and availability is confirmed at checkout. See the current list.