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  2. 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 ...

  3. List of California area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_California_area_codes

    On November 1, 2024, it will also be overlaid by area code 738. 341: overlay with 510: started service on July 22, 2019. 350: overlay with 209: started service on November 28, 2022. 369: overlay with 707: started service on February 1, 2023. 408: San Jose, Sunnyvale, Gilroy, Morgan Hill, and Los Gatos; most of Santa Clara County.

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

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

    Area codes are also assigned for non-geographic purposes. The rules for numbering NPAs do not permit the digits 0 and 1 in the leading position. [1] Area codes with two identical trailing digits are easily recognizable codes (ERC). NPAs with 9 in the second position are reserved for future format expansion.

  5. 30 Scam Phone Numbers To Block and Area Codes To Avoid - AOL

    www.aol.com/finance/19-dangerous-scam-phone...

    Look at the area code: Start by comparing the phone number’s area code to the list of area codes you should never answer. If it’s on the list, there’s a good chance there’s a scammer on ...

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

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

    Toll-free telephone number; 0–9. Area codes 201 and 551; Area codes 202 and 771; ... Area codes 408 and 669; Area code 409; Area code 410; Area codes 410, 443, and 667;

  7. List of area code overlays - Wikipedia

    en.wikipedia.org/wiki/List_of_area_code_overlays

    An area code overlay is a numbering plan area (NPA) in the North American Numbering Plan (NANP) that has multiple area codes assigned. Overlay complexes are used to add central office prefixes in an NPA to increase the number of available telephone numbers. [1]