Colorado · Mountain Time
748 Area Code
The 748 area code is a telephone area code in Colorado, covering Fort Collins and the surrounding area. It lies in the Mountain Time zone. Code 748 is a new relief code (planned) overlaying 970.
Last updated June 5, 2026
Where is the 748 area code?
748 serves Fort Collins and nearby communities in Colorado. In the wider directory it sits in the West region.
Overlay codes serving Fort Collins
Fort Collins is served by an overlay of 2 area codes: 748, 970. Because more than one code covers the same area, 10-digit dialing is mandatory — you must dial the area code for every local call. New phone lines may be assigned any of these codes, so Fort Collins numbers are no longer tied to a single prefix.
History of the 748 area code
748 is a newly planned code (planned). It is being introduced as an overlay on the 970 territory to add fresh numbering capacity without changing anyone's existing number. See the newest area codes timeline for activation details.
Is 748 a scam or spam risk?
748 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 748 number on your screen is no guarantee the caller is local or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.
Other Colorado area codes
Explore more
See every code in Colorado, compare codes across the West region, or view all Mountain Time codes. You can also browse the 7XX block or the complete numeric list of US area codes.
New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.
Quick answers
748 area code FAQ
Where is the 748 area code?
The 748 area code is in Colorado, serving Fort Collins and the surrounding area in the West region.
What time zone is 748 in?
748 is in the Mountain Time zone.
Do I have to dial 10 digits for 748?
Yes. Because Fort Collins is an overlay area, you must dial the full 10-digit number (area code + 7 digits) for every call.
Is 748 a toll-free or premium code?
No. 748 is a standard geographic area code, so calling it costs the same as any local or long-distance call on your plan. Toll-free calls use 800, 888, 877, 866, 855, 844 or 833.