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  2. 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 state ...

  3. Area codes 503 and 971 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_503_and_971

    Area code 503 was one of the original North American area codes of 1947, assigned to the entire state until 1995, when its extent was reduced to the northwestern corner. Area code 971 was assigned to the service area in stages, completed in 2008, to form an overlay in the area with ten-digit dialing.

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

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

    This feature group 'B' has been rendered obsolete by 1010xxx "dial-around" feature group 'D', but the exchange remains reserved in each individual area code. 951: California (western Riverside County, including Riverside, Corona, California, Lake Elsinore, Mira Loma, Moreno Valley, Sun City, Temecula, Winchester, Lakeview, etc.) July 17, 2004

  5. A new area code is coming to Northern California. Who gets ...

    www.aol.com/area-code-coming-northern-california...

    The current area code is “in high demand” and is expected to be depleted by September 2025. An overlay “adds a second area code to the same geographic region.”

  6. Area codes 541 and 458 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_541_and_458

    Area code 541 was created in an area code split from area code 503 on November 5, 1995. Area code 458 was added to the same service area on February 10, 2010 to form an overlay . History

  7. Category:Area codes in California - Wikipedia

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

    0–9. Area codes 209 and 350; Area codes 213, 323, and 738; Area codes 310 and 424; Area codes 408 and 669; Area codes 415 and 628; Area codes 510 and 341

  8. Area codes 530 and 837 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_530_and_837

    This area code was therefore scheduled to transition to ten-digit dialing by October 24, 2021. [1] On June 8, 2023, the California Public Utilities Commission assigned area code 837 to overlay 530, effective January 31, 2025. [2] 837 will serve as California's 40th area code. As ten-digit dialing is already in effect, no permissive dialing ...

  9. List of area code overlays - Wikipedia

    en.wikipedia.org/wiki/List_of_area_code_overlays

    In addition to being the sole area code in the Space Coast region around the Kennedy Space Center, this is the only partial overlay area code in North America 323: 213: Central Los Angeles, incl. Downtown L.A. and Hollywood: 326: 937: Southwest Ohio: 331: 630: Western suburbs of Chicago: 332, 646 , 917: 212