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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 510 and 341 - Wikipedia

    en.wikipedia.org/wiki/Area_codes_510_and_341

    Area codes 510 and 341 are telephone area codes in the North American Numbering Plan (NANP) serving much of the East Bay in the U.S. state of California. They cover parts of Contra Costa County and western Alameda County, including the city of Oakland, but excluding Dublin, Livermore, Pleasanton, and Sunol. Area code 510 was established on ...

  4. Area code 925 - Wikipedia

    en.wikipedia.org/wiki/Area_code_925

    Area code 925 is a telephone area code in the North American Numbering Plan for a northern part of the U.S. state of California. It was created in an area code split of area code 510 in 1998. The numbering plan area comprises the inland portions of the East Bay counties of Alameda and Contra Costa .

  5. List of places in California (B) - Wikipedia

    en.wikipedia.org/wiki/List_of_places_in...

    Contra Costa County: 94506 Blackhawk-Camino Tassajara: 1 Contra Costa County Black Lands: 1 San Joaquin County Black Meadow Landing: 1 San Bernardino County: 92267 Black Oak: 1 Tuolumne County Black Oaks: 1 Sonoma County Black Point-Green Point: 1 Marin County Blackstone: 1 Fresno County: 93710 Blairsden: 1 Plumas County: 96103 Blanchard

  6. West County Detention Facility - Wikipedia

    en.wikipedia.org/wiki/West_County_Detention_Facility

    WCDF is located in the Point Pinole area of the city between Parchester Village to the south, Point Pinole Regional Shoreline to the west and the Hilltop area to the east. The jail can house up to 1,093 inmates. [1] There are five different housing areas, four for males and one for females. [1]

  7. Saranap, California - Wikipedia

    en.wikipedia.org/wiki/Saranap,_California

    Saranap's ZIP code is 94595, but is addressed "Walnut Creek, CA" for delivery purposes as this is the postal designated city name used by residents. The community is in telephone area code 925. Saranap's population as of the 2010 census was 5,202. [4] Saranap has had numerous opportunities to be annexed as either part of Lafayette, or of Walnut ...