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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.
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.
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:
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.
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. Boulder is the principal city of the Boulder metropolitan statistical area, which had 330,758 residents in 2020, and is part of the Front Range Urban Corridor.
In addition to Boulder, CO area code information read more about area codes 303, 720, 983 details and Colorado area codes. Boulder, CO is located in Boulder County and observes the Mountain Time Zone. View our Times by Area Code tool . Select Any Colorado City or Town Alphabetically.
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Our area code lookup makes it easy to find area codes in Colorado. Includes area code listings of all Colorado area codes with corresponding cities.
