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  2. 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 1949, Oakland, CA, received the fifth regional dial switching center for Operator Toll Dialing in the nation, [ 2 ] which set the stage for ...

  3. Area codes 803 and 839 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_803_and_839

    Original numbering plan area 803. Area code 803 is one of the original 86 area codes assigned in 1947, when it was assigned to serve the entire state. [1] In 1995, the Upstate was split off into a separate numbering plan area with area code 864. Until then, South Carolina had been one of the most populated states with just one area code.

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

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

    California's 40th area code; 838: New York (Albany, Schenectady, Plattsburgh, Saranac Lake, Lake George, Westport, and most of northeastern New York) September 19, 2017: overlaid on 518; 839: South Carolina (Columbia, Rock Hill, Sumter, Aiken, and most of central South Carolina) May 26, 2020: overlaid on 803 [19] 840

  5. Area code 603 - Wikipedia

    en.wikipedia.org/wiki/Area_code_603

    Area code 603 is the sole area code for the U.S. state of New Hampshire in the North American Numbering Plan (NANP). It was created as one of the original 86 numbering plan areas in October 1947. In 2011, area code 603 was said to be nearing exhaustion and a second area code for New Hampshire was expected to be activated by 2013 as a statewide ...

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

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

    Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, or 888. Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special dialing code in the group NXX for various other purposes.

  7. Area codes 805 and 820 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_805_and_820

    Area code 805 was created in 1957, when one of the original North American area codes in California, 213, was reduced in size to provide more central office codes in the Los Angeles area. In 1998, the California-Nevada Code Administration (CNCA) determined that California was under "substantial number growth" which required exhaustion ...

  8. Area codes 408 and 669 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_408_and_669

    The additional demands for PCS and cellular phone numbers helped necessitate the 831/408 area code split, the 650/415 split, and the earlier 510/415 split. Part of the previous dialing plan included a mass calling prefix for radio station contests, introduced in the 1960s because some contests put unacceptable loads on the Bay Area's telephone ...

  9. Area codes 864 and 821 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_864_and_821

    Area code 864 was created in a division of numbering plan area 803 on December 3, 1995. [1] Projections of 2021 anticipated the requirement of relief from telephone number exhaustion in the Upstate region with a new area code for 2024 or 2025.