Area codes in Los Banos, California
Los Banos, California uses 2 area codes — 209 and 350. The main Los Banos area code is 209.
Area codes serving Los Banos
Phone numbers in Los Banos are written as ten digits — for example (209) 555-0190 — and fall in the Pacific Time zone.
How Los Banos came to have 2 area codes
The original Los Banos area code is 209, in service since 1958. As the area ran low on available numbers, an overlay code was added over the same region for new phone lines: 350 (2022). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Los Banos now uses all 2 codes and every local call is dialed with ten digits.
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More cities in California
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Frequently asked questions
What is the area code for Los Banos?
The main area code for Los Banos, California is 209. Los Banos is now served by 2 area codes in total: 209, 350.
How many area codes does Los Banos have?
Los Banos has 2 area codes: 209, 350.
Why does Los Banos have more than one area code?
As Los Banos used up the numbers available in its original area code (209, in service since 1958), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.
How do you dial a Los Banos number?
Dial all 10 digits — the area code (209 or 350) 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.