San Jose, CA Area Codes

Area codes serving San Jose

San Jose sits in California, part of the West region and the Pacific Time zone. Its numbers are spread across an overlay of 2 codes that all cover the same ground: 408, 669.

The original code is 408 (in service since 1959). As the area ran low on numbers, regulators added overlay codes on top instead of splitting the city, so longtime residents kept their numbers while new lines received a newer code.

Code	Area served	In service
408	San Jose and most of Santa Clara County in Silicon Valley	January 1, 1959
669	San Jose and most of Santa Clara County in Silicon Valley	November 20, 2012

Nearby cities sharing these area codes

• Sunnyvale
• Santa Clara
• Milpitas
• Cupertino
• Campbell
• Los Gatos
• Morgan Hill
• Gilroy
• Saratoga
• Monte Sereno

How to pick an area code for a new number

When you activate a new line in San Jose, the carrier assigns whichever code has numbers available — you usually can't choose. If a specific code matters to you (for example the prestige of 408), ask the carrier whether any blocks remain, or request a number transfer. All codes here dial identically and cost the same.

Dialing in San Jose

Because San Jose is an overlay area, 10-digit dialing is mandatory: always dial the area code plus the seven-digit number, even for a neighbor. See 10-digit dialing and overlay area codes for the background. For every code in California, visit the California area codes page.