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Area code 303 is the original area code assigned to the entire state when the first nationwide telephone numbering plan was created in 1947. Today it only serves the greater Denver Metropolitan Area. Area codes 720 and 983 are overlay codes for today's 303 numbering plan area (NPA). Area code 719 serves Colorado Springs and southeastern Colorado.
Area code 719 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Colorado. The numbering plan area (NPA) includes Colorado Springs , Pueblo , Monument , Leadville , Alamosa , Monte Vista , the San Luis Valley , Cañon City , Trinidad , Rocky Ford , La Junta , Walsenburg and southeastern Colorado.
Area code 303 was one of the original North American area codes of 1947, and originally served the entire state of Colorado. It remained the state's sole area code for 40 years. Colorado's explosive growth in the second half of the 20th century, particularly in the Denver/Boulder area, made it a certainty that Colorado would need another area code.
Area code 970 is a telephone area code in the North American Numbering Plan (NANP) for most of the western and northern parts of the U.S. state of Colorado. The numbering plan area includes Aspen, Breckenridge, Durango, Estes Park, Fort Collins, Glenwood Springs, Grand Junction, Greeley, Loveland, Silverthorne, Steamboat Springs, and Vail. It ...
Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.
Map of Colorado area codes in blue (with border states) Pages in category "Area codes in Colorado" The following 4 pages are in this category, out of 4 total.
This makes the fastest-dialing area code 212 (5 total clicks), followed by 312 and 213 (6 clicks). The area code 605 is much slower than these, at 21 clicks. Many large US cities generally had fast-dialing area codes with the middle digit 1. Touch-tone dialing, introduced later, eliminated the wait.
Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, and 888. Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special dialing code in the group NXX for various other purposes.