720 Area Code
Denver (overlay), Colorado
Area code 720 is located in Denver (overlay), Colorado. It covers Denver, Aurora, and surrounding areas in the Mountain time zone (UTC-7). Administered by NANPA.
Where is area code 720?
Area code 720 is located in Denver (overlay), Colorado. It covers Denver, Aurora, and surrounding areas in the Mountain time zone (UTC-7).
Cities Covered by Area Code 720
Area code 720 primarily serves the Denver (overlay) area of Colorado. The exact coverage includes Denver, Aurora, and Lakewood, along with surrounding communities and suburbs.
Time Zone
Mountain Time — UTC-7
Area code 720 operates in the Mountain Time Zone. When calling 720 numbers from a different time zone, be sure to account for the time difference to reach people during business hours.
About Area Code 720
Area code 720 was introduced in 1998 as a geographic area code serving Denver (overlay), Colorado. It remains the primary area code for this region. Area codes are administered by NANPA (North American Numbering Plan Administration), the organization responsible for managing phone number resources in the US and Canada.