Area code 408 serves a major portion of Silicon Valley in California, including cities such as San Jose, Cupertino, Santa Clara, and Los Gatos. Established in 1959 as a split from 415, 408 has long been associated with the tech boom and the rapid growth of the San Francisco Bay Area’s southern region. It encompasses the headquarters of tech giants like Apple and Intel, as well as San Jose International Airport and San Jose State University. Due to rising demand for phone numbers, 408 was overlaid by area code 669 in 2012, and ten-digit dialing is now required. Despite the overlay, 408 retains a legacy of prestige and innovation and is widely recognized in business and pop culture. The area code is frequently used in branding, from local startups to tech meetups, symbolizing Silicon Valley's global influence.