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
Phone numbers in San Ramon are written as ten digits — for example (925) 555-0190 — and fall in the Pacific Time zone.
All California area codes · Is a San Ramon call a scam?
Nearby cities
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More cities in California
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- San Diego area codes
- San Francisco area codes
- Sacramento area codes
- San Jose area codes
- Fresno area codes
- Long Beach area codes
- Bakersfield area codes
Frequently asked questions
What is the area code for San Ramon?
The main area code for San Ramon, California is 925.
How many area codes does San Ramon have?
San Ramon has 1 area code: 925.
How do you dial a San Ramon number?
Dial all 10 digits — the area code (925) followed by the 7-digit local number. From abroad, dial +1, then the area code and number.
Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of August 2, 2026. Refreshed monthly.