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      San Francisco Bay Area

      • 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.
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  1. Coordinates: 37.5°N 122.3°W. Numbering plan areas in California (blue) and border states. Area code 650 is shown in red. 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.

  2. Find out the location, time zone, and phone number prefixes of 650 area code in California. See the list of cities served by 650 area code and the ZIP codes, NXX analysis, and carrier assignments for each city.

  3. 3 days ago · 650 is an area code in California, US, serving San Francisco and nearby cities. It lies within the Pacific Time zone (PT), with daylight saving time from early March to early November.

    • UTC/GMT -7:00 hours
    • PDT
    • UTC/GMT -8:00 hours
  4. 3 days ago · Find out the location, phone prefixes and service providers for area code 650 in California. See the list of cities and counties covered by 650 area code and the new numbers being added in 2024.

    Area Code / Prefix
    Location
    Company / Service Provider
    SAN MATEO, CA
    TWILIO INTERNATIONAL, INC.
    SOUTH SAN FRANCISCO, CA
    T-MOBILE USA, INC.
    SAN MATEO, CA
    UTILITY TELECOM GROUP, LLC - CA
    Mountain View, CA
    BANDWIDTH.COM CLEC, LLC - CA
  5. The 650 area code covers parts of California, including Palo Alto, San Mateo, and Mountain View. Find out the time zone, phone prefixes, and reverse phone lookup for the 650 area code on Spokeo.

  6. May 1, 2024 · Area Code 650 is in California and covers 22 cities and 4 counties, including San Jose, San Francisco, and Santa Clara County. It has a single time zone of Pacific (GMT -08:00) and no overlay or relief planning.

  7. Area code 650 covers most of San Mateo County and a small part of Santa Clara County in California. It was created in 1997 from a split of area code 415 and has overlays with other area codes.

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