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  2. Area codes 415 and 628 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_415_and_628

    Area codes 415 and 628 are telephone area codes in the North American Numbering Plan (NANP) for the city of San Francisco and its northern suburbs in Marin County (across the Golden Gate ), and the northeast corner of San Mateo County in the U.S. state of California. Area code 415 was one of the eighty-six original North American area codes ...

  3. List of California area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_California_area_codes

    As of July 2023, California has 38 active area codes. Area code. Service area. Notes. 209. Stockton, Modesto, Merced, Turlock; the northern San Joaquin Valley and the central Sierra Nevada range. Split from 415 on October 26, 1957; split off 559 on November 14, 1998; overlaid with 350 on November 28, 2022. 213.

  4. Area codes 408 and 669 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_408_and_669

    On October 20, 2011, the California Public Utilities Commission confirmed implementing 669 as an overlay to the existing 408 numbering plan area, the first in the San Francisco Bay Area. The new area code's official in-service date was November 20, 2012, when new central office codes could be activated.

  5. Area code 650 - Wikipedia

    en.wikipedia.org/wiki/Area_code_650

    Area code 650 is a telephone area code in the North American Numbering Plan (NANP) for the San Francisco Bay Area in the U.S. state of California. It was split from area code 415 on August 2, 1997, and includes most of San Mateo County (except the northernmost portion), part of San Francisco , and the northwestern portion of Santa Clara County ...

  6. Financial District, San Francisco - Wikipedia

    en.wikipedia.org/wiki/Financial_District,_San...

    Area codes. 415/6 28. The Financial District is a neighborhood in San Francisco, California, United States, that serves as its main central business district and had 372,829 jobs according to U.S. census tracts as of 2012-2016. [5] It is home to the city's largest concentration of corporate headquarters, law firms, insurance companies, real ...

  7. Original North American area codes - Wikipedia

    en.wikipedia.org/wiki/Original_North_American...

    The red fields are the NPAs that hosted the Regional Centers for toll-switching established in the General Toll Switching Plan of 1929: New York City (212), Los Angeles (213), Dallas (214), Chicago (312), St. Louis (314), and San Francisco (415) in the multi-NPA states, and in Denver (303) and Atlanta (404) in states with just a single area ...

  8. Area codes 707 and 369 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_707_and_369

    Area code 707 is shown in red. Area codes 707 and 369 are telephone area codes in the North American Numbering Plan (NANP) for the northwestern part of the U.S. state of California. The area codes serve part of the northern San Francisco Bay Area, as well as the North Coast. Major cities in the area codes include Napa, Sebastopol, Vallejo ...

  9. San Francisco Bay Area - Wikipedia

    en.wikipedia.org/wiki/San_Francisco_Bay_Area

    The San Francisco Bay Area, commonly known as the Bay Area, is a region of California surrounding and including the San Francisco Bay. The Association of Bay Area Governments defines the Bay Area as including the nine counties that border the estuaries of San Francisco Bay, San Pablo Bay, and Suisun Bay: Alameda, Contra Costa, Marin, Napa, San Mateo, Santa Clara, Solano, Sonoma, and San Francisco.