San Francisco, California

Where Is Area Code 628?

Area code 628 serves San Francisco, California. It covers the City and County of San Francisco, which sits on the northern tip of the San Francisco Peninsula in Northern California.

Area code 628 is used in the same local calling area as area code 415. Communities covered include San Francisco neighborhoods such as the Mission District, Sunset District, Richmond District, and SoMa, because the code applies across the city and county rather than to one single neighborhood.

Area code 628 covers a city known for San Francisco Bay and the Pacific Ocean. Major landmarks in the service area include the Golden Gate Bridge, Alcatraz Island, Golden Gate Park, and San Francisco International Airport's broader metro region, although the airport itself is in San Mateo County and not in San Francisco.

History of Area Code 628

Area code 628 was established as an overlay for area code 415. The California Public Utilities Commission approved 628 in 2013, and it began service on February 21, 2015.

Area code 415 is one of the original North American area codes created in 1947. Before 628 launched, 415 had already been reduced by several splits as the Bay Area added more telephone lines, mobile phones, and other services that needed numbers. The 628 overlay allowed new numbers to be added in San Francisco without changing existing 415 numbers.

Key Facts About Area Code 628

• Area code 628 is in California.
• Area code 628 serves San Francisco, which is both a city and a county.
• Area code 628 is an overlay of area code 415.
• Area code 628 began service on February 21, 2015.
• Area code 628 is in the Pacific Time Zone.
• Area code 628 requires 10-digit dialing because it shares the same territory as area code 415.
• The service area includes major San Francisco landmarks such as the Golden Gate Bridge, Golden Gate Park, and Alcatraz Island.
• San Francisco had a population of 808,437 at the 2020 United States Census.

Frequently Asked Questions

What state is area code 628 in?

Area code 628 is in California.

What major cities use area code 628?

Area code 628 is used in San Francisco.

Is area code 628 a toll-free number?

No. Area code 628 is a geographic area code.