California Areacode: 628
Note：628 is the areacode of California, United States. For international number is 001628 or 001-628、0010628、+1-628、+1+628、+1628、00-1-628、00 1 628.
More About Area Code 628
Area code 628 was first put in service March 21, 2015. Currently, the largest city it serves is San Francisco, CA, and it overlaps coverage areas with area code 415.