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  2. List of Colorado area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Colorado_area_codes

    Area code 303 is the original area code assigned to the entire state when the first nationwide telephone numbering plan was created in 1947. Today it only serves the greater Denver Metropolitan Area. Area codes 720 and 983 are overlay codes for today's 303 numbering plan area (NPA). Area code 719 serves Colorado Springs and southeastern Colorado.

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

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

    Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.

  4. Centennial, Colorado - Wikipedia

    en.wikipedia.org/wiki/Centennial,_Colorado

    Centennial hosts most native wildlife and is a good reflection of Colorado's front range ecosystem. Centennial has seen a boost in coyote populations in recent years, leading to resident education on how to deter coyotes from eating family pets. [10] Centennial is located at 39°35'47" North, 104°50'38" West (39.5963, −104.8439). [11]

  5. Area codes 717 and 223 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_717_and_223

    Area codes 717 and 223 are telephone area codes in the North American Numbering Plan (NANP) for South Central Pennsylvania and the Susquehanna Valley. The numbering plan area (NPA) includes the Harrisburg , Lancaster , and York metropolitan areas and a considerable portion of Pennsylvania Dutch Country , an area with nearly two million people.

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

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

    The northeastern and western portions of area code 303, including Fort Collins, Grand Junction, Vail and Aspen, were separated on April 2, 1995, and became area code 970. This split reduced 303 to the Denver-Boulder area. [3] With the 1995 split, 303 was the only Colorado area code that did not border another state.

  7. Denver metropolitan area - Wikipedia

    en.wikipedia.org/wiki/Denver_metropolitan_area

    Through a variety of measures the area's air quality was improved and in 2002 the EPA designated the area in compliance with all federal health-based air quality standards. Denver was the first major city in the United States to reach compliance with all six of these standards after previously violating five of them. [9]

  8. Area codes 716 and 624 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_716_and_624

    Area codes in New York state with the area codes 716 and 624 highlighted in red. Area codes 716 and 624 are telephone area codes in the North American Numbering Plan (NANP) for Buffalo, Niagara Falls, and four surrounding counties in western New York. 716 was one of the original North American area codes established in 1947, while 624 was assigned to the identical numbering plan area (NPA) in ...

  9. Area codes 214, 469, 972, and 945 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_214,_469,_972...

    Area code 469 was introduced on July 1, 1999, in an overlay plan for most of the eastern portion of the Metroplex. At the same time, the 214/972 boundary was "erased," and 972 was converted into an additional overlay for the entire region. The result was three area codes overlaying the same area, with ten-digit dialing required for all calls.