Area Code 628 is located in the San Francisco Bay Area of California. It serves Mill Valley, San Anselmo, and many more areas of the region.
The 628 area code was put into service on March 21, 2015. Overlays for 415 and 826 were previously used for this area code.
California Counties within Area Code 628
Marin, and San Francisco.
California Major Cities within Area Code 628
Novato, San Anselmo, San Francisco, and San Rafael, Marin and San Francisco.
Area Code 628 Time Zone?
628 is located in the Pacific time zone, which is known as America/Los Angeles.