Colorado Phone Number Lookup
Colorado has 6 telephone area codes in the North American Numbering Plan (NANP). Browse the directory to see each code's listed primary location, and select a code for available prefix, company, caller-report, and time-zone details.
An area code may serve multiple communities. The primary location shown here is the largest population center matched to that code in our database, not a complete list of every community served.
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Area Codes
| Area Code | Primary Location | Reports |
|---|---|---|
| 303 | Denver | 2 reports |
| 719 | Pueblo | 10 reports |
| 720 | Denver | 20 reports |
| 748 | — | 1 report |
| 970 | Greeley | 3 reports |
| 983 | Denver | No reports |
Report Categories in Colorado
| Category | Reports |
|---|---|
| Unknown Caller | 27 |
| Scam | 7 |
| Telemarketer | 2 |
Top 10 Largest Cities in Colorado
| City | Population |
|---|---|
| Denver city | 740,613 |
| Colorado Springs city | 494,743 |
| Aurora city | 410,053 |
| Fort Collins city | 171,500 |
| Lakewood city | 156,927 |
| Thornton city | 147,766 |
| Arvada city | 122,901 |
| Westminster city | 116,182 |
| Greeley city | 115,073 |
| Pueblo city | 110,404 |
Colorado Area Code Map
Recent Caller Reports in Colorado
Timezone
The listed area codes for Colorado primarily use the Mountain Timezone.
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