Colorado area codes
Colorado has 6 area codes covering 3 areas. In 2 of them several codes overlay the same ground, so a number there can have any of them: 303, 720 and 983 around Denver; 748 and 970 around Fort Collins. The newest, 748, came into service in 2025.
- Area codes
- 6
- Areas
- 3
- Overlay areas
- 2
- Time zone
- Mountain
- Newest
- 748 (2025)
- ZIP codes
- 645 in Colorado
Somewhere in Colorado now? What area code am I in? answers from your location.
Every Colorado area code
| Code | Where | Overlays | Since |
|---|---|---|---|
| 303 | Denver, Longmont, Fort Lupton | 720, 983 | 1947 |
| 719 | Colorado Springs, Pueblo, Peyton | none | 1988 |
| 720 | Denver, Longmont, Fort Lupton | 303, 983 | 1998 |
| 748 | Fort Collins, Greeley, Loveland (as 970's overlay) | 970 | 2025 |
| 970 | Fort Collins, Greeley, Loveland | 748 | 1995 |
| 983 | Denver, Longmont, Fort Lupton | 303, 720 | 2022 |
Colorado area codes by area
Codes that overlay one another share one area. The places listed have a telephone rate centre of their own in NANPA's records, largest first; each links to its ZIP codes.
303, 720, 983 — Denver
303 (1947) was here first; 720 (1998) and 983 (2022) overlay it, so a number from anywhere in the area can have any of them.
10 places:
6 counties:
970, 748 — Fort Collins
970 (1995) was here first; 748 (2025) overlays it, so a number from anywhere in the area can have any of them.
108 places, the largest 36 here (all of them on 970):
- Fort Collins
- Greeley
- Loveland
- Grand Junction
- Windsor
- Montrose
- Durango
- Fruita
- Steamboat Springs
- Sterling
- Berthoud
- Fort Morgan
- Edwards
- Rifle
- Glenwood Springs
- Delta
- Craig
- Cortez
- Gypsum
- Eagle
- Gunnison
- Aspen
- Carbondale
- Mead
- Eaton
- Estes Park
- Brush
- Breckenridge
- New Castle
- Vail
- Basalt
- Silt
- Yuma
- La Salle
- Platteville
- Bayfield
8 counties:
719 — Colorado Springs
70 places, the largest 36 here (all of them on 719):
- Colorado Springs
- Pueblo
- Peyton
- Canon City
- Alamosa
- Trinidad
- Lamar
- La Junta
- Salida
- Monte Vista
- Florence
- Rocky Ford
- Burlington
- Walsenburg
- Buena Vista
- Leadville
- Las Animas
- Center
- Limon
- Del Norte
- Colorado City
- Ordway
- Beulah
- Springfield
- Rush
- Fairplay
- Cheyenne Wells
- Hugo
- Howard
- Cripple Creek
- Fowler
- Manassa
- Hartsel
- Lake George
- La Veta
- Creede
8 counties:
Area codes of the largest cities in Colorado
† NANPA lists no rate centre for the town itself; these are the codes of the nearest one. A town on an area-code boundary can differ from its neighbour.
Questions about Colorado area codes
How many area codes does Colorado have?
6: 303, 719, 720, 748, 970 and 983. 5 of them are in overlay areas, where several codes share the same ground.
What is the newest area code in Colorado?
748, in service since 2025. It overlays 970.
What are the area codes of the largest cities in Colorado?
Denver: 303, 720 and 983. Colorado Springs: 719. Aurora: 303, 720 and 983. Fort Collins: 970. Lakewood: 303, 720 and 983.
What time zone are Colorado area codes in?
Mountain time.
Every US area code · Colorado ZIP codes
Source: NANPA NPA database and central office code assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.
Cite this page
zipcodes.pro. “Colorado area codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-codes/co
Underlying data is public domain or openly licensed — sources, vintages and licences.