Area codes in Palo Alto, California
Palo Alto, California uses area code 650. The main Palo Alto area code is 650.
Area codes serving Palo Alto
All California area codes · Is a Palo Alto call a scam?
Nearby cities
- Redwood City area codes
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Sourced from the official NANPA (North American Numbering Plan Administrator) numbering database, current as of June 20, 2026. Refreshed monthly.