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

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

    Each NPA is identified by one or more numbering plan area codes (NPA codes, or area codes), consisting of three digits that are prefixed to each local telephone number having seven digits. A numbering plan area with multiple area codes is called an overlay. Area codes are also assigned for non-geographic purposes.

  3. List of California area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_California_area_codes

    Split from 310 on January 25, 1997 619: City of San Diego and suburbs: created by a split from 714 on November 5, 1982; split off 760 on March 22, 1997, and 858 on June 12, 1999; re-merged with 858 in June 2018 to create the 619/858 overlay 626: Most of the San Gabriel Valley including Pasadena, El Monte, West Covina. Split from 818 on June 14 ...

  4. Lists of North American area codes - Wikipedia

    en.wikipedia.org/wiki/Lists_of_North_American...

    The largest telephone numbering plan in North American is the North American Numbering Plan (NANP), serving 25 regions or countries. Other countries maintain an autonomous numbering plan with distinct country codes within the international E.164 specifications by the International Telecommunication Union. Original North American area codes

  5. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    In less than two years, area code 612 again exhausted its supply of telephone numbers, and necessitated a three-way division in 2000, creating the new area codes 763 and 952. The division again followed political boundaries, rather than rate center boundaries, resulting in additional split prefixes; a few numbers were transferred from 612 to ...

  6. Area codes 619 and 858 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_619_and_858

    Area codes 619 and 858 are telephone area codes in the North American Numbering Plan (NANP) for most of San Diego County in the U.S. state of California. Area code 619 was created by a split of area code 714 in 1982. In 1999, a part of the 619 numbering plan area was assigned area code 858 in northwest San Diego County.

  7. Mobile network codes in ITU region 3xx (North America)

    en.wikipedia.org/wiki/Mobile_network_codes_in...

    This list contains the mobile country codes and mobile network codes for networks with country codes between 300 and 399, inclusively – a region that covers North America and the Caribbean. Guam and the Northern Mariana Islands are included in this region as parts of the United States.

  8. Area codes 202 and 771 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_202_and_771

    Area code 202 was one of the original North American area codes established in October 1947 by AT&T. After the State of New Jersey with area code 201, the District of Columbia was the second numbering plan area (NPA). Area code 771 was added as a second area code to the numbering plan area in April 2021 to create an all-services overlay complex.

  9. Area codes 212, 646, and 332 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_212,_646,_and_332

    The three area codes form an overlay numbering plan, and are also overlaid by area code 917 of a numbering plan area that comprises the entirety of New York City. Area code 212 is the original code assigned for all of the city in 1947. After a restriction of 212 to just Manhattan in 1985, area code 646 was assigned to Manhattan in 1999.