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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, Colorado
Boulder is a home rule city in and the county seat of...
- Boulder, Colorado
Clickable map of Colorado area codes in blue (with bordering states). 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.
Boulder is a home rule city in and the county seat of Boulder County, Colorado, United States. 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.
Sep 1, 2017 · Boulder, CO Area Codes: List, Map, and Phone Lookup. The city of Boulder is in the state of Colorado. It has the following active area codes:
Boulder. Categories: city in the United States, county seat, college town, big city and locality. Location: Boulder, Front Range, Colorado, Rocky Mountains, United States, North America. View on OpenStreetMap. Latitude. 40.015° or 40° 0' 54" north. Longitude.
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.
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Boulder, CO Area Codes are. 303, 720 and 983. 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.
