Area code 970 is located in Colorado, and covers Denver, Westminster, and Boulder. It was put into service on June 17, 2022.
970 is an overlay code: it overlays area code 303 and is part of the overlay complex 303/720/983.
Colorado Counties within Area Code 983:
Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver, Douglas, Eagle, El Paso, Elbert, Gilpin, Jefferson, Park, Sedgwick, and Weld.
Colorado Major Cities within Area Code 983:
Aurora, Boulder, Brighton, Broomfield, Castle Rock, Castlewood, Columbine, Commerce City, Denver, Englewood, Highlands Ranch, Ken Caryl, Lafayette, Lakewood, Littleton, Longmont, Loveland, Northglenn, Parker, Southglenn, Thornton, Westminster and Wheat Ridge.
Area Code 983 Time Zone?
Mountain time zone is also known as America/Denver.
Go here to see the complete list of United States Area Codes.