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  2. List of Ohio area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Ohio_area_codes

    The first nationwide telephone numbering plan of 1947 divided Ohio into four numbering plan areas (NPAs), one each for a quadrant of the state: 216, 419, 513, and 614. In 1996, 330 and 937 were added by splitting existing NPAs. In 1997, 440 and 740 were added in additional area code splits. In 2000, 234, and in 2002, 567 were added as overlays ...

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

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

    The North American Numbering Plan (NANP) divides the territories of its members into geographic numbering plan areas (NPAs). 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.

  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. Richest and poorest area codes in the US - AOL

    www.aol.com/2017-12-08-richest-and-poorest-area...

    A phone number communicates a lot --and if you dig a little deep, an area code contains information about the economic situation of its residents, too. Richest and poorest area codes in the US ...

  6. Area codes 614 and 380 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_614_and_380

    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 code covering the same territory.

  7. List of Washington (state) area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Washington_(state...

    The U.S. state of Washington has six telephone area codes. The state initially used a single area code until it was divided in 1957 with the creation of area code 509 to serve Eastern Washington. In 1995, 206 was split again to serve just the Puget Sound region after area code 360 was created for the remainder of Western Washington.

  8. List of Pennsylvania area codes - Wikipedia

    en.wikipedia.org/.../List_of_Pennsylvania_area_codes

    This is a list of telephone area codes of Pennsylvania. In 1947, the American Telephone and Telegraph Company divided Pennsylvania into four numbering plan areas (NPAs) and assigned distinct area codes for each. Since 1995, several relief actions in form of area code splits and overlays have expanded the list of area

  9. List of California area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_California_area_codes

    In 1947, the American Telephone and Telegraph Company (AT&T) devised the first nationwide telephone numbering plan and assigned the original North American area codes. The state of California was divided into three numbering plan areas (NPAs) with distinct area codes : 213 , 415 , and 916 , for the southern, central, and northern parts of the ...