Area code 970

Area code 970 is a telephone area code in the North American Numbering Plan (NANP) for most of the western and northern parts of the U.S. state of Colorado.

The numbering plan area includes Aspen, Breckenridge, Durango, Estes Park, Fort Collins, Glenwood Springs, Grand Junction, Greeley, Loveland, Silverthorne, Steamboat Springs, and Vail.

[3] As of October 17, 2020, 988 has been assigned by law as a three-digit code for the National Suicide Prevention Lifeline.

To avoid conflicts in switching systems, the Federal Communications Commission ordered telecommunication carriers of 83 area codes, including 970, to transition to ten-digit dialing, even when the area code is not involved in an overlay complex.

Per the timeline set by the North American Numbering Plan Administrator, permissive dialing began on April 24, 2021 and ten-digit dialing has been required from October 24, 2021.

Area code 970 Area codes 303, 720, and 983 Area code 719 Area code 785 Area code 308 Area code 307 Area code 435 Area code 928 Area code 575 Area code 505 Area code 580 Area code 620
Clickable map of Colorado area codes in blue (with bordering states). [ 1 ]