What is 628 area code?

The 628 area code is an overlay for the 415 area code, which covers the city of San Francisco, California and its surrounding areas. The 628 area code was first introduced in 2015 to provide additional phone number options for residents and businesses in the 415 area code region. Calls within the 415 and 628 area codes are local calls and do not require dialing the area code. The 628 area code covers areas such as Daly City, Marin County, and parts of San Mateo County.