Area Code 707
Area Code 707 is in California
(310 and 424) - (415 and 628)
(408 and 669) - (714 and 657)
(760 and 442) - (818 and 747)
Area Code 707 History:
Area code 707 was put into service. Area code 707 was created from a split of area code 415.
Counties in California within area code 707 include:
Del Norte County, Humboldt County, Lake County, Marin County, Mendocino County, Napa County, Solano County, Sonoma County, and Trinity County.
Major cities or places in California within area code 707 include:
Area code 707 serves most of northwest California including the larger cities and communities of Benicia, Eureka, Fairfield, Napa, Petaluma, Rohnert Park, Santa Rosa, Suisun City, Vacaville, Vallejo, and Windsor, in addition to many smaller communities within the area code 707 service area.