748 area code
Fort Collins area, Mountain Time.Area code 748 covers Fort Collins, Greeley, Grand Junction and 117 more places in Colorado, on Mountain Time. 970 covers the same area.
Right now in Fort Collins
Mountain Time (MST, UTC-7; MDT, UTC-6 in summer)
Calling hours: Every day, 8 AM to 9 PM (the federal rule)
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Where 748 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 748 covers 120, but it's new and has barely been issued yet, so these are ranked by the numbers its overlay already holds.
Fort Collins, Greeley, Grand Junction, Loveland, Durango, Vail, Glenwood Springs, Montrose, Aspen, Dillon, Steamboat Springs, Sterling + 108 more
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 748 number?
Sales calls to homes and cell phones have legal hours, set by the federal rule. Hold every 748 number to them, since you can't tell a work line from a personal cell.
What applies to 748Every day, 8 AM to 9 PM
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
748 and 970
748 went into service on July 7, 2025. 748 and 970 cover the same area, so new numbers can get either code and neighbors can have different area codes. 748 holds 0% of the area's exchanges; 970 holds the most. Local calls take all 10 digits.
- 1995970 overlay
- 2025748 starts
Source: NANPA area code database
Other Colorado area codes
All Colorado area codesCalling a list of 748 numbers?
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748 area code FAQ
What area code is 748?
748 is a Colorado area code for Fort Collins, Greeley, Grand Junction, Loveland and 116 more places.
What time zone is the 748 area code in?
Mountain Time (MST, UTC-7; MDT, UTC-6 in summer).
Is 970 the same as 748?
Same area, different code. 748 and 970 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 748 numbers?
Every day, 8 AM to 9 PM, local time, under the federal rule.
When did the 748 area code start?
On July 7, 2025.
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