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Boulder, CO Area Codes: List, Map, and Phone Lookup. Area Codes>. Colorado>. Boulder. The city of Boulder is in the state of Colorado. It has the following active area codes: 720.
Colorado currently utilizes 5 area codes. When first established by AT&T and the Bell System in 1947, 303 covered the entire state of Colorado. The most recently added was 983 in 2022 as an overlay to 303 .
Clickable map of Colorado area codes in blue (with bordering states). [1] The U.S. state of Colorado is served by five telephone area codes of the North American Numbering Plan (NANP). Area code 303 is the original area code assigned to the entire state when the first nationwide telephone numbering plan was created in 1947.
The numbering plan area comprises Denver and Boulder, as well as their surrounding suburbs, including Lakewood, Littleton, Longmont, Broomfield, Aurora, and Castle Rock. Area code 303 is the original area code, while area codes 720 and 983 were added (in 1998 and 2022 respectively) to form an overlay complex for the area, meaning that the same ...
80301, 80302, 80303, 80304, 80305, 80306, 80307, 80308, 80309, 80310, 80314, 80321, 80322, 80323, 80328, 80329
33.07. * Demographic data is based on information taken from the 2010 Census as is Derived from our ZIP Code Database Products. Lookup area code information for BOULDER, CO. Get the NPA NXX (area code and prefix) as well as much more data for BOULDER, CO.
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Wiggins 970. Willard 970. Windsor 970. Woodrow 970. Wray 970. Yampa 970. Yuma 970. Get a full list of Colorado area codes. Check out the area’s map, the current time, and area codes listed by city.
