The 970 area code covers Fort Collins, Greeley and 107 more places in Colorado.
Area code 970 is in Colorado, on Mountain Time. In the 970 area, phone numbers are given out most in Larimer County, then Weld and Mesa counties. It has been in service since April 2, 1995. 748 covers the same area, so two neighbours can have different area codes.
- Where
- 8 counties in Colorado, mostly Larimer County, Weld County and Mesa County
- Time zone
- Mountain Time
- In service since
- April 2, 1995
- Shares its area with
- 748 (since 2025)
- Prefixes in use
- 775
- How to dial
- Local calls need all 10 digits: 970-555-0142.
Find out who called you from a 970 number.
Enter the full 10-digit number to see who it is listed to and the city and state on the listing. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup. To see whether it is a mobile, a landline or a VoIP line, use our free VoIP checker. To see which carrier a (970) number is on today, use our free carrier lookup.
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Fort Collins holds 12% of the phone prefixes in area code 970.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 775 prefixes in use shows where 970 numbers are actually given out.
- Fort Collins96 prefixes, 12%
- Greeley62 prefixes, 8%
- Grand Junction57 prefixes, 7%
- Loveland36 prefixes, 5%
- Durango29 prefixes, 4%
- Vail24 prefixes, 3%
- Glenwood Springs21 prefixes, 3%
- Montrose19 prefixes, 2%
Also served: Aspen, Dillon, Steamboat Springs and Sterling and 97 smaller places.
Qwest (Lumen) holds the most phone number prefixes in area code 970: 189 of 775.
NANPA, which runs the North American numbering plan, assigns each prefix (the three digits after the area code) to one carrier. Here is how the 775 prefixes in use in 970 divide between carriers; holders this page does not name are grouped as other carriers.
| Carrier | Prefixes | Share |
|---|---|---|
| Qwest (Lumen)Lumen's landline company | 189 | 24% |
| T-MobileMobile network | 70 | 9% |
| AT&T MobilityMobile network | 54 | 7% |
| Level 3 (Lumen)Lumen's business and wholesale network | 47 | 6% |
| CenturyLinkLandline company | 29 | 4% |
| Ton80 Communications | 22 | 3% |
| 48 other carriers | 364 | 47% |
68% of these prefixes are pooled, which means the blocks of 1,000 numbers inside them can belong to other carriers. Any number can also have been moved to another carrier since, so this shows who holds the prefixes, not who serves a given number.
Want the carrier of one exact number? Our free carrier lookup checks it, because numbers move between carriers.
Source: NANPA central office code assignments, October 1, 2026.
970 has been overlaid once since 1995.
1995
970 starts on April 2, 1995, split off from 303.
2025
On July 7, 2025, 748 is added on top of 970, so new numbers here can get either code.
A 970 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
The area codes closest to 970 are 303, 719 and 307.
This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.
Colorado has 5 other area codes.
These are the questions people ask most about area code 970.
Where is area code 970?
970 covers Fort Collins, Greeley, Grand Junction and Loveland and 105 more places in Colorado. In the 970 area, phone numbers are given out most in Larimer County, then Weld and Mesa counties.
What state is area code 970 in?
Colorado. 970 is a Colorado area code on Mountain Time.
What cities use area code 970?
The places holding the most 970 prefixes are Fort Collins, Greeley, Grand Junction, Loveland, Durango, Vail, Glenwood Springs and Montrose, out of 109 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.
Which phone company owns area code 970?
No single phone company owns 970. NANPA's records show Qwest (Lumen) holds the most 970 prefixes, 189 of 775, followed by T-Mobile and AT&T Mobility. Numbers move between carriers, so check one exact number with a carrier lookup.
What time zone is area code 970 in?
970 is on Mountain Time.
When did area code 970 start?
970 went into service on April 2, 1995, when it was split off from 303.
Is 970 the same area as 748?
Yes. 748 (since 2025) covers the same ground as 970. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 970 number?
Local calls need all 10 digits: 970-555-0142.
Is 970 a toll-free number?
No. 970 is a regular area code for Fort Collins and Greeley in Colorado, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.
What area codes are near 970?
The closest are 303/720/983 (Denver, Colorado), 719 (Colorado Springs, Colorado) and 307 (Cheyenne, Wyoming), measured between the centres of each area.
Who called me from a 970 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 970 a scam?
970 is a real Colorado area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Put this lookup on your site: our free area code widget takes two lines of code and shows any US area code's state, time zone and local time.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.