The area code 415 is located in San Francisco, California.
Area code 415 serves the heart of the San Francisco Bay Area, covering San Francisco, California and most of Marin County to the north. It links iconic places on both sides of the Golden Gate Bridge, including downtown San Francisco, the Presidio, and the Marin Headlands. Landmarks within the 415 area include Alcatraz Island, Fisherman’s Wharf, Golden Gate Park, and the coastal towns of West Marin. The area uses Pacific Time (PT) and observes daylight saving time.
Major cities and communities in 415 include:
Established in 1947 as one of the original North American Numbering Plan area codes, 415 once covered a larger part of the Bay Area before later splits. Today, 415 works alongside the 628 overlay, which was added to meet demand for new phone numbers in the region. Ten-digit dialing is required for local calls within the 415/628 overlay. This change helped preserve existing 415 phone numbers while adding new 628 numbers across the same footprint.
For context, neighboring area codes include 650 (the Peninsula), 510 (much of the East Bay), 707 (Sonoma, Napa, and the North Bay beyond Marin), and 408/669 (the South Bay, including San Jose). If you see a 415 number, it’s typically tied to San Francisco or Marin County locations and businesses, from tech offices downtown to coastal communities. The code’s long history and tight link to the city make 415 one of the most recognized phone prefixes in California. It remains a strong part of the Bay Area’s identity and communications network.
“San Francisco’s 2020 population was 873,965.” — U.S. Census Bureau