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  1. en.wikipedia.org › wiki › List_of_Colorado_area_codesList of Colorado area codes - Wikipedia

    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.

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    • Boulder County Area Code, Colorado | Boulder County Area Code Map
    • Boulder Map | City Map of Boulder, Colorado
    • Boulder Zip Code Map – Zip Code Map
    • Boulder Colorado Zip Code Map - Map
    • CallingAdvice.com. Make Colorado phone calls cheap - includes Colorado ...

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  3. en.wikipedia.org › wiki › Area_codes_303,_720,_and_983Area codes 303, 720, and 983 - Wikipedia

    Clickable map of Colorado area codes in blue (with bordering states). [1] 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. The numbering plan area comprises Denver and Boulder, as well as their surrounding suburbs, including Lakewood, Littleton ...

  4. en.wikipedia.org › wiki › Boulder,_ColoradoBoulder, Colorado - Wikipedia

    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 ...

  5. www.wirefly.com › area-codes › coloradoBoulder, CO Area Codes: List, Map, and Phone Lookup | Wirefly

    Sep 1, 2017 · 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.

  6. www.allareacodes.com › colorado_area_codesColorado area codes - Map, list, and phone lookup

    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 .

  7. www.wirefly.com › area-codes › coloradoColorado Area Codes: List, Map, and Phone Lookup | Wirefly

    There are 4 active area codes in the state of Colorado. Each of these area codes are listed below. 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 ...

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  9. www.countrycallingcodes.com › us-area-codesBoulder, Colorado Area Codes - CountryCallingCodes

    Boulder, Colorado Information. The Boulder area code is 303 or 720. The current time in Boulder, Colorado is 18:42PM (06:42PM) Boulder, Colorado is located in Boulder county.

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