Locations for Area Code - 408

Area code 408 serves the southern portion of the San Francisco Bay Area, including San Jose, Sunnyvale, and Santa Clara—key cities in Silicon Valley. One of California’s original area codes, 408 was established in 1959 after splitting from 415. In 2012, it was overlaid with area code 669, requiring ten-digit dialing. The region is known globally for tech innovation, venture capital, and startup culture. Area code 408 remains a powerful symbol of the digital age, representing the birthplace of many leading tech companies and the dynamic, forward-looking ethos of Silicon Valley.