Area codes in Barstow, California
Barstow, California uses 2 area codes — 760 and 442. The main Barstow area code is 760.
Area codes serving Barstow
Phone numbers in Barstow are written as ten digits — for example (760) 555-0190 — and fall in the Pacific Time zone.
How Barstow came to have 2 area codes
The original Barstow area code is 760, in service since 1997. As the area ran low on available numbers, an overlay code was added over the same region for new phone lines: 442 (2009). Existing numbers kept their original code — an overlay never forces anyone to change their number — which is why Barstow now uses all 2 codes and every local call is dialed with ten digits.
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Frequently asked questions
What is the area code for Barstow?
The main area code for Barstow, California is 760. Barstow is now served by 2 area codes in total: 760, 442.
How many area codes does Barstow have?
Barstow has 2 area codes: 760, 442.
Why does Barstow have more than one area code?
As Barstow used up the numbers available in its original area code (760, in service since 1997), additional "overlay" codes were added over the same area so new phone numbers could keep being assigned.
How do you dial a Barstow number?
Dial all 10 digits — the area code (760 or 442) 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.