Area codes in Fort Collins, Colorado
Fort Collins, Colorado uses 2 area codes — 970 and 748. The main Fort Collins area code is 970.
Area codes serving Fort Collins
Phone numbers in Fort Collins are written as ten digits — for example (970) 555-0190 — and fall in the Mountain Time zone.
How Fort Collins came to have 2 area codes
The original Fort Collins area code is 970, in service since 1995. As the area ran low on available numbers, an overlay code was added over the same region for new phone lines: 748 (2025). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Fort Collins now uses all 2 codes and every local call is dialed with ten digits.
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Nearby cities
- Loveland area codes
- Greeley area codes
- Longmont area codes
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- Brighton area codes
- Westminster area codes
- Denver area codes
More cities in Colorado
- Colorado Springs area codes
- Aurora area codes
- Grand Junction area codes
- Lakewood area codes
- Littleton area codes
Frequently asked questions
What is the area code for Fort Collins?
The main area code for Fort Collins, Colorado is 970. Fort Collins is now served by 2 area codes in total: 970, 748.
How many area codes does Fort Collins have?
Fort Collins has 2 area codes: 970, 748.
Why does Fort Collins have more than one area code?
As Fort Collins used up the numbers available in its original area code (970, in service since 1995), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.
How do you dial a Fort Collins number?
Dial all 10 digits — the area code (970 or 748) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.