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  2. Area codes 209 and 350 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_209_and_350

    Area code 209 was created in an area code split of area code 415 on October 26, 1957. On November 14, 1998, the southern half of this numbering plan area received the assignment of area code 559. On October 24, 2021, 209 was transitioned to 1+10-digit dialing despite not being part of an overlay complex at that time.

  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. List of Massachusetts area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Massachusetts_area...

    Numbering plan areas and area codes since May 2001 September 1997 [1] – May 2001 [2] July 1988 [3] – September 1997 [4] [5] October 1947 – July 1988 [6]. Massachusetts is divided into five distinct numbering plan areas (NPAs), which are served by nine area codes in the North American Numbering Plan (NANP), [7] organized as four overlay complexes and a single-area code NPA.

  5. Area codes 707 and 369 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_707_and_369

    On March 1, 1959, numbering plan area 415 was divided in a flash-cut (without permissive dialing period) in which the northern part of the numbering plan area (Solano County and north thereof) received area code 707, which was California's eighth area code (along with 213, 415, 916, 714, 408, 805, and 209), and the last new area code in the ...

  6. List of California area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_California_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 state, respectively. [ 1 ] In 1950, the boundaries of the numbering plan area were redrawn to produce a division of the northern and central parts along a north–south ...

  7. List of Illinois area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Illinois_area_codes

    Area code 847 exhausted its numbers quickly, so that an overlay area code, 224, was implemented in 1996 for relief. However, mandatory ten-digit dialing was not in effect until 2002. In March 2007, an overlay plan was created for NPA 630 adding area code 331, and 779 was added to 815. With the depletion of new numbers in area codes 312 and 773 ...

  8. List of Ohio area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Ohio_area_codes

    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 March 1, 2024, as an overlay of 440. [4]

  9. Area code 209 - Wikipedia

    en.wikipedia.org/?title=Area_code_209&redirect=no

    From a page move: This is a redirect from a page that has been moved (renamed).This page was kept as a redirect to avoid breaking links, both internal and external, that may have been made to the old page name.