The area code 408 is located in Gilroy, California.
Area code 408 serves Gilroy, California, at the southern edge of Santa Clara County and the South Bay. It connects Gilroy to the heart of Silicon Valley, with U.S. Route 101 running north to San Jose and tech hubs. The code was created in 1959 after a split from 415, and it gained the 669 overlay to boost numbers in 2012. Today, 408/669 phone numbers are common across the region, and 10‑digit dialing is required.
Major communities in the 408/669 service area include:
In and around Gilroy, 408 covers landmarks like the Gilroy Premium Outlets and access to Mount Madonna County Park, with quick routes to the coast via CA‑152. Gilroy is widely known as the “Garlic Capital of the World,” reflecting its strong farming roots and food culture. Across the wider 408 area, you’ll also find Levi’s Stadium in Santa Clara, SAP Center and the Winchester Mystery House in San Jose, and Apple Park in Cupertino. In 1998, nearby coastal counties were split from 408 to form area code 831, which helped manage growth in the Monterey Bay region.
“Area code 408 was created in 1959; overlay 669 was introduced in 2012.” — North American Numbering Plan Administrator (NANPA)
For anyone seeing a 408 phone number, expect it to trace back to the South Bay, especially Santa Clara County. New numbers may be assigned as 408 or 669, but both reach the same places. This makes 408/669 a defining pair for Gilroy and the broader Silicon Valley community, from agriculture in the south to innovation in the north.