Geographic Regions and Area Codes

Area Code 628 is located in the state of California, primarily serving the city of San Francisco and Marin County. It also covers a small portion of San Mateo County. The major cities within this area code include San Francisco, San Rafael, and Novato. Area Code 628 is an overlay for Area Code 415, which means it shares the same geographic region. Neighboring area codes include 707/369 to the north, 650 to the south, and 510/341 to the east.