Area code 415 serves San Francisco and parts of Marin County. As one of the original area codes introduced in 1947, 415 is one of the most recognized and prestigious codes in the United States. Due to the high demand in the Bay Area, it was overlaid with area code 628 in 2015, making ten-digit dialing mandatory. San Francisco’s global reputation in finance, technology, tourism, and culture makes 415 a highly sought-after code, often used as a symbol of elite urban identity and digital-era innovation. It remains synonymous with the city’s storied past and forward-thinking future.