Gimple Roof Engineers (303) 423-4402
303 was one of the original area codes put into service in 1947, and originally covered the entire state of Colorado. However, due to Colorado's explosive growth during the second half of the 20th century (particularly in the Denver area), an impending number shortage made a split necessary. On March 5, 1988, southeastern Colorado became area code 719. The northeastern and western portions of 303 switched to 970 on April 2, 1995, leaving 303 to cover its current area. As a result, 303 is the only one of Colorado's three area codes that does not reach the New Mexico border. 303 was overlaid with 720 on June 1, 1998.
With the exception of the Roggen area, which has local calling only with itself, Brighton, and Wiggins), the entire 303/720 area is a local calling zone, meaning no long distance charges are applied to any calls made from one phone to another within the area.
Jefferson County - Population 534,558