Area Code 628
Area Code 628 is in California
(310 and 424) - (341 and 510)
(415 and 628) - (408 and 669
(714 and 657) - (760 and 442)
(818 and 747) - (820 and 805)
(916 and 279)
Area Code 628 History:
Area code 628 put into service.
Area code 628 was officially put into service as an overlay of area code 415. Effective February 21, 2015 mandatory ten digit dialing in area codes 415 and 628 became mandatory. For more details view area code 415.
Ten digit dialing (area code + seven digit number) is necessary in the 415/628 overlay because different homes in the same geographic area can have the same seven digit phone number but each would have a different area code.
Counties in California within area code 628 include:
Marin County, and San Francisco County.
Major cities or places in California within area code 628 include:
Area code 628 along with area code 415 serve the larger communities of Novato, San Anselmo, San Francisco, and San Rafael, most of Marin County and all of San Francisco County.