With new telephone numbers in greater demand, the Colorado  Public Utilities Commission approved the implementation of the new 748 area code to overlay the existing 970 region. The 970 region includes but is not limited to Aspen, Breckenridge, Durango, Estes Park, Fort Collins, Glenwood Springs, Grand Junction, Greeley, Loveland, Silverthorne, Steamboat Springs, Vail, and many other smaller communities. The new 748 area code will serve the same geographic region currently served by the 970 area code.   

While large-scale use of the new area code won’t begin until late 2026, starting on July 7, 2025, customers in the 970 area code overlay region may be assigned a number in the new 748 area code when they request new service or an additional line. The 748 area code will co-exist everywhere in this region with the 970 area code. Customers receiving a 748 area code will be required to dial the area code and phone number for all local calls, just as customers with numbers from the 970 area code do today.

There are several important facts about the 748 area code overlay:

• The price of a call, coverage area, or other rates and services will not change due to the additional overlay.
• What is a local call now will remain a local call. 
• You will continue to dial 10 digits for local calls within and between the overlay area codes and 1+10 digits for long-distance calls and include the area code when giving the number to friends, family, business associates, customers, etc.
• You can still dial just three digits to reach 911 and 988, as well as 211, 311, 411, 511, 611, 711, or 811 if those are currently available in your community.

Customers should ensure that all services, automatic dialing equipment, or other types of equipment recognize the new 748 area code as a valid area code and should continue to store or program telephone numbers as 10-digit numbers. Some examples include but are not limited to: stored telephone numbers in contact lists in wireless or cordless phones, PBXs, fax machines, internet dial-up numbers, speed dialers, call forwarding settings, voicemail services, medical alert devices, safety, alarm, security systems and gates, ankle monitors, and/or other similar equipment. Customers should also ensure their websites, personal and business stationery, printed checks, advertising materials, contact information, and personal or pet ID tags include the area code.

For more information, contact your local telephone service provider or visit the Colorado  Public Utilities Commission website at https://puc.colorado.gov/telecommunications