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  2. North American Numbering Plan - Wikipedia

    en.wikipedia.org/wiki/North_American_Numbering_Plan

    Each three-digit area code has a capacity of 7,919,900 telephone numbers (7,918,900 in the United States). Despite the widespread use of fictional telephone numbers of the form NYX 555-XXXX , only the block of line numbers from 0100 through 0199 are reserved specifically for this purpose, leaving the rest available for assignment.

  3. Lists of North American area codes - Wikipedia

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

    Lists of North American area codes. 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.

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

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

    once reserved as a third area code for West Virginia, but it was replaced by a 304-932 exchange area code + exchange number in Charleston; 933: not in use; available for non-geographic assignment easily recognizable code (ERC) 934: New York (Suffolk County on Long Island) July 16, 2016: overlaid on 631; 935: not in use; available for geographic ...

  5. Area codes 614 and 380 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_614_and_380

    The regions shown in blue are in Ohio. Area codes 614 and 380 are telephone area codes in the North American Numbering Plan (NANP) for all or part of four counties in central Ohio, surrounding and including the state capital of Columbus. Area code 614 is one of the original area codes assigned for Ohio in 1947, while area code 380 is an overlay ...

  6. Area code 530 - Wikipedia

    en.wikipedia.org/wiki/Area_code_530

    Area code 530. Numbering plan areas in California (blue) and border states. Area code 530 is shown in red. Area code 530 is a telephone area code in the North American Numbering Plan (NANP) in northeastern and Northern California. It was created in 1997 in an area code split of 916. The numbering plan area (NPA) includes the Sacramento Valley ...

  7. List of Ohio area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Ohio_area_codes

    In 2015, area code 740 was overlaid with 220, relieving its rapid depletion. In 2016, area code 614 was overlaid with 380 in the Columbus/Central Ohio area for the same reason. In 2020, 326 was added as an all services overlay for 937. Area code 283 was added as an overlay for 513 on April 28, 2023. [2][3] Area code 436 went into service on ...

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