Denver, Colorado · MST/MDT (UTC-7) · United States
Denver, Boulder, Littleton — Denver metro core
Original 1947 code. Mile High City at 5,280 feet elevation.
Area code 303 is located in Denver, Colorado (United States). It covers Denver, Boulder, Littleton — Denver metro core.
Area code 303 (Denver, Colorado) is in the MST/MDT time zone. Standard time is UTC-7 and UTC-6 during Daylight Saving Time.
Area code 303 is a legitimate NANPA-assigned code serving Denver, Colorado. However, scammers can spoof any area code. If you receive an unexpected call from (303), verify the caller before sharing personal information.
Area code 303 follows MST/MDT (UTC-7). See the live clock at whattime.city/denver/ for the exact current time in Denver.
Area code 303 was introduced in 1947. Original 1947 code. Mile High City at 5,280 feet elevation.