The 350 area code covers the same area as 209, including Stockton, Modesto and 53 more places in California.
350 has been in service since 2022, on Pacific Time. 209 covers the same area, so two neighbours can have different area codes.
- Where
- 8 counties in California, mostly San Joaquin County, Stanislaus County and Merced County
- Time zone
- Pacific Time
- In service since
- 2022
- Shares its area with
- 209 (since 1958)
- Prefixes in use
- 88
- How to dial
- Local calls need 1, then the area code, then the number: 1-350-555-0142.
Find out who called you from a 350 number.
Enter the full 10-digit number to see who it is listed to, where it is registered, and whether it is a mobile, landline or VoIP line.
Stockton holds 13% of the phone prefixes in area code 350.
A prefix is the three digits after the area code, and NANPA assigns each one to a town. Counting the 88 prefixes in use shows where 350 numbers are actually given out.
- Stockton11 prefixes, 13%
- Modesto10 prefixes, 11%
- Atwater7 prefixes, 8%
- Manteca5 prefixes, 6%
- Lodi4 prefixes, 5%
- Turlock4 prefixes, 5%
- Tracy4 prefixes, 5%
- Dos Palos2 prefixes, 2%
Also served: Fresno, Atwater, Los Banos and Jackson and 43 smaller places.
350 started in 2022 as an overlay on 209, and its ground has not changed since.
2022
350 starts as an overlay on 209: new numbers on the same ground.
A 350 number on your screen can still be a scam, because caller ID is easy to fake.
- Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
- Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
- Hang up on anyone who wants gift cards, crypto or a wire transfer, or asks you to read out a code that was just texted to you.
- Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.
California has 40 other area codes.
These are the questions people ask most about area code 350.
Where is area code 350?
350 covers Stockton, Modesto, Merced and Manteca and 51 more places in California, in San Joaquin County, Stanislaus County and Merced County.
What time zone is area code 350 in?
350 is on Pacific Time.
Is 350 the same area as 209?
Yes. 209 (since 1958) covers the same ground as 350. Nobody's number changed when it was added; new lines simply get whichever code has numbers left, so two neighbours can have different codes.
How do I dial a 350 number?
Local calls need 1, then the area code, then the number: 1-350-555-0142.
Who called me from a 350 number?
Enter the full 10-digit number in the lookup above. It returns the listed owner where there is a public record, where the number is registered, and whether it is a mobile, a landline or a VoIP line.
Is area code 350 a scam?
350 is a real California area code, so the code itself is not a warning sign. Scam callers fake local-looking numbers on purpose, so judge the call by what the caller asks for, and look the number up before calling back.
Source: NANPA, the North American Numbering Plan Administrator: its area code database and prefix assignments, as of October 1, 2026.