Central Colorado. They cover Boulder, Longmont, Aurora, Denver, Highlands Ranch.
The area code 720 is for Denver, Colorado. Ask
The area code 720 is used in Colorado.
Denver, Colorado's city government changed its area code from 303 to 720. !
Area Code 720 covers 7 Counties in Colorado. Adams, Arapahoe, Boulder, Denver,...
Area code 720 is used in the central Colorado area of Denver. !