Area code
Area code 350 — Stockton, CA
California · in service since November 28, 2022
Area code 350 covers parts of California; the place with the most of its prefixes is Stockton. It is an overlay: 209 serves the same area, so neighbors can have different area codes.
Overlay, same area: 209
Local time in Stockton
Spam reports from Sep 23 – Oct 22, 2026
Low #393 of 461 codes
45 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zonePacific Time
- Local calls1 + 10 digits
- Prefixes102 assigned
- Runs out~1Q 2056
- Unwanted call?Block & report
Spam call reports about 350 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 0 |
| Sep 14 | 12 |
| Sep 21 | 10 |
| Sep 28 | 11 |
| Oct 5 | 9 |
| Oct 12 | 9 |
| Oct 19 (4 days) | 9 |
Compared with all codes
- Robocalls
- 82%all codes 75%
- Callers with the same code
- 3%all codes 35%
- Rank by complaints
- #393of 461 · bottom quarter
- FCC complaints, Oct 2025 – Sep 2026
- 93 about text messages
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Reducing your debt (credit cards, mortgage, student loans) | 14 23% | |
| Calls pretending to be government, businesses, or family and friends | 9 15% | |
| Vacation & timeshares | 6 10% | |
| Dropped call or no message | 4 7% | |
| Medical & prescriptions | 2 3% | |
| Energy, solar, & utilities | 1 2% |
Where the people who complained live
Sep 11 – Oct 22, 2026
| State | Complaints | |
|---|---|---|
| California | 18 30% | |
| Ohio | 4 7% | |
| Tennessee | 4 7% | |
| Michigan | 3 5% | |
| Texas | 3 5% |
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 350 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| STOCKTON | Stockton | San Joaquin County | 11 |
| MODESTO | Modesto | Stanislaus County | 10 |
| ATWATER | Atwater | Merced County | 7 |
| MANTECA | Manteca | San Joaquin County | 5 |
| LODI | Lodi | San Joaquin County | 4 |
| TRACY | Tracy | San Joaquin County | 4 |
| TURLOCK | Turlock | Stanislaus County | 4 |
| CLEMENTS | — | — | 2 |
| DOS PALOS | Dos Palos | Merced County | 2 |
| GALT | Galt | Sacramento County | 2 |
Plus 31 smaller exchange areas.
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- California
- Assigned by NANPA
- May 19, 2022
- Local dialing
- 1 + 10 digits (NANPA: 1+10D)
- NANPA planning letters
- PL-594
Source: NANPA, NPA database of Oct 24, 2026.
Is 350 running out of numbers?
Previous forecast (October 2025): 2055, moved later by 1 year.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 350 prefixes
The five largest of 19 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Onvoy, LLC | 20 20% | |
| Onvoy Spectrum, LLC | 17 17% | |
| New Cingular Wireless PCS, LLC | 12 12% | |
| Multiple Ocn Listing | 9 9% | |
| Commio, LLC | 7 7% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 350
What area code is 350?
A California area code, in service since November 28, 2022.
Where is 350 area code, and what time zone is it in?
Stockton, CA; Pacific Time.
Why am I getting spam calls from 350?
45 FTC complaints from Sep 23 – Oct 22, 2026, most often about debt reduction (not verified by the FTC; caller ID can be spoofed).
Will 350 get a new area code?
NANPA forecasts exhaust in 1Q 2056; no relief planning listed.