Area code
Area code 357 — California
California · in service since March 26, 2025
Area code 357 covers parts of California. It is an overlay: 559 serves the same area, so neighbors can have different area codes.
Overlay, same area: 559
Local time in California
Spam reports from Sep 23 – Oct 22, 2026
Too few reports for a level #439 of 461
1 FTC complaint
Consumer reports, not verified by the FTC.
See the reports- Time zonePacific Time
- Local calls1 + 10 digits
- Prefixes23 assigned
- Runs out~4Q 2072
- Unwanted call?Block & report
Spam call reports about 357 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 0 |
| Sep 14 | 1 |
| Sep 21 | 0 |
| Sep 28 | 0 |
| Oct 5 | 0 |
| Oct 12 | 0 |
| Oct 19 (4 days) | 1 |
Compared with all codes
- Robocalls
- 1 of 1
- Callers with the same code
- 0 of 2
- Rank by complaints
- #439of 461 · bottom tenth (fewest complaints)
- FCC complaints, Oct 2025 – Sep 2026
- 1
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Computer & technical support | 1 | |
| Other | 1 |
Where the people who complained live
Fewer than 5 complaints in the archive: not shown.
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 357 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| CLOVIS | Clovis | Fresno County | 1 |
| FIREBAUGH | Firebaugh | Fresno County | 1 |
| FRESNO | Fresno | Fresno County | 1 |
| HANFORD | Hanford | Kings County | 1 |
| KINGSBURG | Kingsburg | Fresno County | 1 |
| LEMOORE | Lemoore | Kings County | 1 |
| SANGER | Sanger | Fresno County | 1 |
| SPRINGVL | — | — | 1 |
| VISALIA | Visalia | Tulare County | 1 |
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- California
- Assigned by NANPA
- December 19, 2023
- Local dialing
- 1 + 10 digits (NANPA: 1+10D)
- NANPA planning letters
- PL-624
Source: NANPA, NPA database of Oct 24, 2026.
Is 357 running out of numbers?
Previous forecast (October 2025): 2067, moved later by 5 years.
Forecast exhaust year by edition
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 357 prefixes
The five largest of 6 original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Multiple Ocn Listing | 14 61% | |
| Onvoy, LLC | 5 22% | |
| Exiant Communications LLC | 1 4% | |
| Opentact Inc. | 1 4% | |
| Verizon Wireless | 1 4% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 357
What area code is 357?
A California area code, in service since March 26, 2025.
Where is 357 area code, and what time zone is it in?
California; Pacific Time.
Why am I getting spam calls from 357?
1 FTC complaint from Sep 23 – Oct 22, 2026, most often about computer & technical support (not verified by the FTC; caller ID can be spoofed).
Will 357 get a new area code?
NANPA forecasts exhaust in 4Q 2072; no relief planning listed.