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  2. List of Colorado area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Colorado_area_codes

    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). Area code 303 is the original area code assigned to the entire state when the first nationwide telephone numbering plan was created in 1947.

  3. Area codes 303, 720, and 983 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_303,_720,_and_983

    The numbering plan area comprises Denver and Boulder, as well as their surrounding suburbs, including Lakewood, Littleton, Longmont, Broomfield, Aurora, and Castle Rock. Area code 303 is the original area code, while area codes 720 and 983 were added (in 1998 and 2022 respectively) to form an overlay complex for the area, meaning that the same ...

  4. Template:Colorado area codes image map - Wikipedia

    en.wikipedia.org/wiki/Template:Colorado_area...

    Clickable map of Colorado area codes in blue (with bordering states). ...

  5. Aurora, Colorado - Wikipedia

    en.wikipedia.org/wiki/Aurora,_Colorado

    Aurora (/ ə ˈ r oʊ r ə /, / ə ˈ r ɔː r ə /) is a home rule municipality located in Arapahoe, Adams, and Douglas counties, Colorado, United States. [1] The city's population was 386,261 at the 2020 United States Census with 336,035 residing in Arapahoe County, 47,720 residing in Adams County, and 2,506 residing in Douglas County. [7]

  6. List of North American Numbering Plan area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_North_American...

    2023: returned to the pool of area codes available for future area code relief; 457: Louisiana (Shreveport–Bossier City, Monroe, Alexandria, Fisher, Tallulah, and most of northern Louisiana) September 25, 2025 [3] to be overlaid on 318; previously a fictitious area code assigned to identify Naked DSL/Dry Loop and dedicated data lines in ...

  7. Denver–Aurora combined statistical area - Wikipedia

    en.wikipedia.org/wiki/Denver–Aurora_Combined...

    The United States Census Bureau estimates that the population was 3,214,218 as of July 1, 2012, an increase of +3.99% since the 2010 United States Census, and ranking as the 16th most populous metropolitan combined statistical area and the 17th most populous primary statistical area of the United States.

  8. List of municipalities in Colorado - Wikipedia

    en.wikipedia.org/wiki/List_of_municipalities_in...

    [a] [5] [6] The City of Black Hawk with a 2020 population of 127 is the least populous Colorado city, while the Town of Castle Rock with a 2020 population of 73,158 is the most populous Colorado town. [1] [5] At the 2020 United States Census, 4,299,942 of the 5,773,714 Colorado residents (74.47%) lived in one of the 271 municipalities active at ...

  9. Lone Tree, Colorado - Wikipedia

    en.wikipedia.org/wiki/Lone_Tree,_Colorado

    Lone Tree is located on the northern border of Douglas County, directly adjacent to Arapahoe County. It is in the South Metro area of Denver, located 18 miles (29 km) south of Denver's downtown. The city annexed the territory of the now-defunct University of Colorado South Denver's campus, the former site of The Wildlife Experience, in 2017. [9]