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Clickable map of Colorado area codes in blue (with bordering states). 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.
Boulder is a home rule city in and the county seat of Boulder County, Colorado, United States. [1] With a population of 108,250 at the 2020 census, it is the most-populous city in the county and the 12th-most populous city in Colorado. [6] Boulder is the principal city of the Boulder metropolitan statistical area, which had 330,758 residents in ...
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Area code 303 was one of the original North American area codesof 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. ...
The numbering plan area is one of the largest toll-free calling zones in the western United States.[citation needed] With the exception of Roggen, Brighton, and Wiggins,[failed verification]no long-distance charges are levied for any calls made from one telephone to another in the area.
Sep 1, 2017 · List of all area codes in Boulder, CO. Boulder, CO area code map, list, and phone lookup.
Boulder, Colorado Area Code. Boulder, CO is officially utilizing an area code overlay in which area codes 303, 720 and 983 serve the same geographic area. Ten digit dialing (area code + seven digit number) is necessary.
There are two lists that Wirefly provides for the area codes in Colorado. The first table below shows the most populated cities in Colorado with the area codes listed next to them. The next table shows the all the Colorado state area codes by number with the names of the city they are used in.
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Boulder: 303 and 720 Nestled against the Rocky Mountains, Boulder shares the 303 and 720 area codes with Denver. Known for its outdoor adventures, vibrant arts scene, and the University of Colorado, Boulder is a hub of innovation and culture.
