Colorado Area Codes
5 area codes in Colorado, United States. Country code: +1. Find area codes by city and region.
All Colorado Area Codes
| Area Code | Major Cities | Region |
|---|---|---|
| 303 | Denver | Denver Metro |
| 719 | Colorado Springs, Pueblo | South |
| 720 | Denver (overlay) | Denver Metro |
| 970 | Fort Collins, Grand Junction | North/West |
| 983 | Denver (overlay) | Denver Metro |
About Colorado Area Codes
Colorado uses 5 area codes under the North American Numbering Plan (NANP). When calling within Colorado, dial the 3-digit area code followed by the 7-digit phone number. From abroad: exit code + 1 + area code + number.