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

Phone numbers in Palo Alto are written as ten digits — for example (650) 555-0190 — and fall in the Pacific Time zone.

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Nearby cities

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Frequently asked questions

What is the area code for Palo Alto?

The main area code for Palo Alto, California is 650.

How many area codes does Palo Alto have?

Palo Alto has 1 area code: 650.

How do you dial a Palo Alto number?

Dial all 10 digits — the area code (650) 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.