357 Area Code — CA
Area code 357 serves CA in the Pacific time zone, in service since 2025. The FCC has 1 unwanted-call complaints against 1 different 357 numbers on record. Look up the exact number that called you below.
Reported 357 numbers
No 357 numbers currently pass our complaint threshold. Look up the exact number that called you — the lookup works on every US number, whether or not it has complaint history.
About area code 357
- Serves
- CA
- Time zone
- Pacific
- In service since
- 2025-03-26
- Overlay
- Yes — 10-digit dialing
Source: NANPA numbering records, refreshed weekly.
Spam calls from 357? What to know
Seeing repeated missed calls from 357 numbers you don't recognize is the classic signature of neighbor-spoofing robocall campaigns. The caller isn't necessarily in CA — spoofing software displays whatever digits the campaign chooses. Never call unknown numbers back; look them up first, and report unwanted calls to the FCC to build the public record.
Area code 357 FAQs
Where is area code 357?
Area code 357 serves CA, in the Pacific time zone. It is part of an overlay complex, so multiple area codes serve the same territory and 10-digit dialing is required. It has been in service since 2025.
Why do I keep getting calls from 357 numbers?
Robocallers use "neighbor spoofing" — displaying a number with a local area code to make you more likely to answer. A call showing area code 357 may not originate from CA at all. Look up the full 10-digit number on this site to see its complaint history before calling back.
Are 357 numbers safe to call back?
Area codes themselves are neither safe nor unsafe — 357 contains millions of legitimate lines alongside any spoofed or spam numbers. The FCC has logged 1 unwanted-call complaints against 1 distinct 357 numbers in our current data window. Check the specific number's report page before returning a missed call.