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List of Colorado area codes. Coordinates: 38.9972°N 105.5478°W. 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).
- List of counties in Colorado
Select the OpenStreetMap link at the right to view the...
- List of counties in 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.
Sep 1, 2017 · List of all area codes in Boulder, CO. Boulder, CO area code map, list, and phone lookup.
Select the OpenStreetMap link at the right to view the location of these 64 counties. 2023 population estimates. For United States Census Bureau population estimates for Colorado counties as of July 1, 2023, see the List of Colorado counties by population.
CountyFips Code [5] [b]County Seat [6] [7]Est. [8]1902-11-151913-03-081861-11-011885-04-14There 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.
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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Boulder County Colorado Area Codes. See the List of Counties by Area Codes for more information. Note that Area Codes often cross County lines. Also see the list of ZIP Codes sorted by Colorado County.