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Learn about the five telephone area codes of Colorado in the North American Numbering Plan (NANP). Find out which areas they serve and when a new area code (748) will be introduced in 2026.
Find out the area codes for the largest cities and towns in Colorado, as well as the time zone, general purpose code, and overlay information. Wirefly also provides tools to compare and save on phone, internet, and TV services in Colorado.
There are 5 local area codes you might come across while perusing phone numbers in Colorado. Two of these are for the Denver Metro, which is adding a third, so Colorado’s fifth, in 2022. 303. The 303 is a number synonymous with Denver and Colorado. It was established as Colorado’s area code in 1947.
Area codes 303, 720 and 983 are telephone area codes in the North American Numbering Plan for the north-central portion of the U.S. state of Colorado. The numbering plan area comprises Denver and Boulder, as well as their surrounding suburbs, including Lakewood, Littleton, Longmont, Broomfield, Aurora, and Castle Rock.
Fixed phone numbers in the United States, state Colorado are comprised of a single country code (+1), a 3 digit area code, a 3 digit local office code (or region code), and a 4 digit line code. Making a call with the wrong country, area, or region code can be costly.
Learn about the history and coverage of the three area codes in Colorado: 303 for Denver and its suburbs, 720 for Denver metro area, and 719 for southern Colorado. Find out how to dial locally and long distance within and outside of Colorado with these codes.
Colorado area codes map gives information about all the area codes of Colorado state along with their counties list.
Find out the five area codes in Colorado and their locations on a map. See the list of area codes and their corresponding numbers, such as 303, 719, and 970.
Find the area code for any city in Colorado, including Denver, Colorado Springs, Fort Collins and more. See the list of 4 area codes and their coverage areas in the state.
Find out the area codes for different cities and regions in Colorado, such as Denver, Colorado Springs, and Aspen. Infoplease.com also provides phone numbers, maps, and sources for area code information.