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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. 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

4. Category:Area codes in the United States - Wikipedia

   en.wikipedia.org/wiki/Category:Area_codes_in_the...

   Print/export Download as PDF ... This category lists the telephone area codes in the United States. ... Toll-free telephone number; 0–9. Area codes 201 and 551;

5. 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 ...

6. Toll-free telephone numbers in the North American Numbering ...

   en.wikipedia.org/wiki/Toll-free_telephone...

   The first automated toll-free telephone numbers were assigned with area code 800, created as inbound Wide Area Telephone Service (InWATS) in 1966 (U.S. intrastate) and 1967 (interstate). These terminated on special fixed-rate trunks which would accept calls from a specified calling area with either no limit or a specific maximum number of hours ...

7. List of New York area codes - Wikipedia

   en.wikipedia.org/wiki/List_of_New_York_area_codes

   Area code Year Current region 212: 1947 New York City: Manhattan only; component of 212/332/646 and 917 overlays 315: 1947 Syracuse, Utica, Watertown, and north central New York; component of 315/680 overlay 329: 2023: Poughkeepsie, Middletown, Newburgh, West Point, Goshen and southeastern New York; component of 845/329 overlay 332: 2017