<P> Area code 707 is a California telephone area code that was split from area code 916 on March 1, 1959 . It covers the northwestern portion of the state of California . It serves part of the northern San Francisco Bay Area, as well as the North Coast and the northwestern portion of the state . Major cities in the area code include Napa, Sebastopol, Vallejo, Benicia, Fairfield, Santa Rosa, Windsor, Healdsburg, Rohnert Park, Petaluma, Fort Bragg, Crescent City, Eureka, Clearlake, Vacaville, Ukiah, and northwestern California . </P> <P> When 707 came online, it became California's eighth area code (along with 213, 415, 916, 714, 408, 805, and 209), and the last new area code in the state until 619 was added in 1982 . Currently, it is also the only one of those eight area codes that has not been further split, despite explosive growth in the area, particularly its southern portion, as well as the proliferation of cell phones and pagers . However, when area code 916 split into area code 530 on November 1, 1997, the Dixon area moved from area code 916 to 707 and also from the Sacramento LATA into the San Francisco LATA . </P>

Where does the area code 707 come from
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