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  2. List of Oklahoma area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Oklahoma_area_codes

    The state of Oklahoma is served by the following area codes: 405/572: Central Oklahoma including Oklahoma City (original area code created in 1947; 572 added as overlay on April 24, 2021 [1] [2] [3] 580: Western and southern Oklahoma (split from 405 in 1997) 539/918: Northeastern Oklahoma including Tulsa (918 created in 1953 as split from 405 ...

  3. Area codes 405 and 572 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_405_and_572

    The other three area codes serving Oklahoma are 918 and 539, which cover northeastern Oklahoma (including the city of Tulsa); and 580, which serves western and southern Oklahoma. Area code 405 was one of the original area codes put into service in 1947 by telecom giant AT&T. Until January 1, 1953, it covered the entire state of Oklahoma.

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

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

    split of 405 and to give Oklahoma two area codes, one centered on Oklahoma City and the other centered on Tulsa; 2011: overlaid by 539; 919: North Carolina (the Research Triangle, including Raleigh, the state capital city; Durham, Cary, and Chapel Hill; and Goldsboro and other parts of north-central North Carolina) 1954

  5. Area codes 918 and 539 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_918_and_539

    Area code 539 was created as an overlay for 918. It became active on April 1, 2011 (although 539 numbers could have been assigned for activation before that date). Mandatory ten-digit dialing became effective on March 5, 2011. It is the first overlay in Oklahoma. [1] [2] The other area codes for Oklahoma are 405 and 572, which cover the ...

  6. Area code 580 - Wikipedia

    en.wikipedia.org/wiki/Area_code_580

    405 was retained by the urban core of central Oklahoma, including Oklahoma City, The state's other area codes, 539/918, serve the northeast, including Tulsa. With the great majority of the old 405's landlines being in the Oklahoma City metropolitan area, the 1997 split made 580 one of the most thinly populated area codes in the nation. Under ...

  7. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    This rounded the total number of digits in a subscriber telephone number to ten: a three-digit area code, a three-digit central office code, and four digits for each line. This fixed format defined the North American Numbering Plan as a closed numbering plan , [ 27 ] as opposed to developments in other countries where the number of digits was ...

  8. Oklahoma City metropolitan area - Wikipedia

    en.wikipedia.org/.../Oklahoma_City_metropolitan_area

    The Oklahoma City metropolitan area, being the state's principal and largest metropolitan statistical area, had a population of 1,425,695 at the 2020 census, up from 1,252,987 in 2010; the 2021 American Community Survey estimated its population increased to 1,441,647. [2]

  9. St. Anthony Hospital (Oklahoma City) - Wikipedia

    en.wikipedia.org/wiki/St._Anthony_Hospital...

    The 2018-opened Oklahoma City Streetcar system serves the hospital. St. Anthony Hospital is a large general hospital located in downtown Oklahoma City, Oklahoma, United States. It is the oldest hospital in the state [1] and one of 19 operated by SSM Health, a not-for-profit Roman Catholic care provider. [2] St.