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The 350 area code covers the same area as 209, including Stockton, Modesto and 53 more places in California.

Area code 350 is in California, on Pacific Time. In the 350 area, phone numbers are given out most in San Joaquin County, then Stanislaus and Merced counties. It has been in service since November 28, 2022. 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
November 28, 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, the city and state on the listing, and whether it is a mobile, landline or VoIP line. It is the same free check as our who called me lookup. To see only the caller ID name on the number, use our free CNAM lookup.

Works for US & Canada numbers. Enter a 10-digit number, e.g. (415) 555-0132.

Free & rate-limited. No signup required to try.

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%
One dot per US area code; 350 is the ringed one.

Also served: Fresno, Atwater, Los Banos and Jackson and 43 smaller places.

Each prefix, or block of 1,000 numbers inside it, is also handed to a carrier. A number keeps its digits when its owner switches carrier, so the prefix no longer tells you who carries it today. Our free carrier lookup shows which carrier a 350 number is on now.

350 started in 2022 as an overlay on 209, and its ground has not changed since.

  1. 2022

    350 starts on November 28, 2022, 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.

  1. Let an unknown call go to voicemail. A real caller leaves a message; a robocaller usually does not.
  2. Look the number up with the box above before you call back, because calling back tells a robocaller your line is live.
  3. 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.
  4. Report unwanted robocalls at reportfraud.ftc.gov, or paste a suspicious message into our free scam checker.

The area codes closest to 350 are 916, 925 and 408.

This list measures the distance between the centres of each area, across state lines, and shows codes that share one area together.

916 / 279Sacramento, CA925Walnut Creek, CA408 / 669San Jose, CA510 / 341Oakland, CA831Salinas, CA650Palo Alto, CA

California has 40 other area codes.

209Stockton213Los Angeles279Sacramento310Santa Monica323Los Angeles341Oakland357Kingsburg369Santa Rosa408San Jose415San Francisco424Beverly Hills442Victorville510Oakland530Chico559Fresno562Long Beach619San Diego626Alhambra628San Francisco650Palo Alto657Anaheim661Bakersfield669San Jose707Santa Rosa714Anaheim738Los Angeles747Burbank760Palm Springs805Santa Barbara818Van Nuys820Camarillo831Salinas837Redding840Pomona858San Diego909Ontario916Sacramento925Walnut Creek949Irvine951Riverside

Browse every US area code

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 the 350 area, phone numbers are given out most in San Joaquin County, then Stanislaus and Merced counties.

What state is area code 350 in?

California. 350 is a California area code on Pacific Time.

What cities use area code 350?

The places holding the most 350 prefixes are Stockton, Modesto, Merced, Manteca, Lodi, Tracy, Turlock and Angels Camp, out of 55 places in all. The count comes from NANPA's prefix assignments as of October 1, 2026.

What time zone is area code 350 in?

350 is on Pacific Time.

When did area code 350 start?

350 went into service on November 28, 2022, as an overlay on 209: new numbers for the same area.

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.

Is 350 a toll-free number?

No. 350 is a regular area code for Stockton and Modesto in California, not a toll-free one. The toll-free codes in North America are 800, 833, 844, 855, 866, 877 and 888.

What area codes are near 350?

The closest are 916/279 (Sacramento, California), 925 (Walnut Creek, California), 408/669 (San Jose, California) and 510/341 (Oakland, California), measured between the centres of each area.

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.