Area code 415
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Image:Area code 415.png North American area code 415 is a state of California telephone area code which was one of the original three area codes established in California in 1947. It originally covered "central-northern California" sans the area code 916 portion. It is now associated with the city of San Francisco, and also covers Marin County and the northernmost portion of San Mateo County. This area code has been subdivided, over the course of the decades since 1947, into Area code 209 (the Central Valley) on January 1, 1958; Area code 408 (the San Jose area) on January 1, 1959; Area code 510 (the inner East Bay, including Oakland) on September 2, 1991; Area code 559 (the Central Valley) on November 14, 1998; Area code 650 (the San Francisco Peninsula/San Mateo County) on August 2, 1997; Area code 831 (the Salinas/Monterey area) on July 11, 1998; and Area code 925 (the outer East Bay, including Walnut Creek) on March 14, 1998.
