Area codes in San Ramon, California
San Ramon, California uses area code 925. The main San Ramon area code is 925.
Area codes serving San Ramon
All California area codes · Is a San Ramon call a scam?
Nearby cities
- Danville area codes
- Dublin area codes
- Walnut Creek area codes
- Pleasanton area codes
- Hayward area codes
- San Leandro area codes
- Concord area codes
- Oakland area codes
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of June 20, 2026. Refreshed monthly.