Area codes 415 and 628

Area code 415 is a California telephone area code that was one of the first three original area codes established in California in October 1947. It serves San Francisco and its northern suburbs in Marin County (across the Golden Gate Bridge), and the northeast corner of San Mateo County. It has been overlaid with area code 628 since February 21, 2015.

Area codes 415 and 628

Area code 415 is a California telephone area code that was one of the first three original area codes established in California in October 1947. It serves San Francisco and its northern suburbs in Marin County (across the Golden Gate Bridge), and the northeast corner of San Mateo County. It has been overlaid with area code 628 since February 21, 2015.