Colorado Area Codes — 6 Codes
Colorado has 6 North American Numbering Plan area codes, covering about 12,508,723 people. The table lists each code with its largest towns, population and overlaps.
All area codes in Colorado
| Area code | Largest towns | Population | ZIP codes | Overlaps |
|---|---|---|---|---|
| 303 | Denver, Aurora, Littleton | 3,294,473 | 189 | 720, 983 |
| 720 | Denver, Aurora, Littleton | 3,294,174 | 188 | 303, 983 |
| 983 | Denver, Aurora, Littleton | 3,276,231 | 184 | 303, 720 |
| 970 | Fort Collins, Greeley, Grand Junction | 1,278,263 | 235 | — |
| 719 | Colorado Springs, Pueblo, Peyton | 1,168,665 | 204 | — |
| 748 | Greeley, Durango, Estes Park | 196,917 | 24 | 970 |
Largest cities in Colorado
Denver 303, 720, 983Colorado Springs 719Aurora 303, 720, 983Littleton 303, 720, 983Fort Collins 970Pueblo 719Longmont 303, 720, 983Arvada 303, 720, 983Boulder 303, 720, 983Greeley 748, 970Broomfield 303, 720, 983Parker 303, 720, 983Englewood 303, 720, 983Grand Junction 970Brighton 303, 720, 983Loveland 970Golden 303, 720, 983Commerce City 303, 720, 983Westminster 303, 720, 983Windsor 970Durango 748, 970Erie 303, 720, 983Montrose 970Louisville 303, 720, 983Thornton 303, 720, 983Peyton 719Lafayette 303, 720, 983Canon City 719Fountain 719Monument 719Wheat Ridge 303, 720, 983Evergreen 303, 720, 983Lone Tree 303, 720, 983Evans 970Johnstown 970Steamboat Springs 970Berthoud 970Sterling 970Glenwood Springs 970Fruita 970
Frequently asked questions
How many area codes does Colorado have?
Colorado uses 6 area codes.
What is the main area code in Colorado?
303 covers the largest population in Colorado.
How do I find the area code for a town?
Open the town in the city list above; each town page lists every area code assigned to it.