357 Area Code: Clovis, California
Area code 357 serves Clovis, Visalia and Firebaugh, California in the Pacific time zone, in service since 2025. Consumers have filed 30 unwanted-call complaints against 23 different 357 numbers. Look up the exact number that called you below.
Area code 357 at a glance
- State
- California
- Main cities
- Clovis, Visalia, Firebaugh, Sanger, Fresno, Kingsburg + 1 more
- Counties
- Fresno County, Tulare County, Kings County
- Local time
- —Pacific
- In service since
- March 26, 2025
- Overlay of
- 559
- Local dialing
- 10 digits (area code + number)
- Exchanges
- 7 rate centers, 9 prefixes
Sources: NANPA area code and central office code records (refreshed weekly); cities and counties matched from US Census Bureau and USGS place names.
Reported 357 numbers
No single 357 number has enough complaints yet for a full report page, so none are listed. Look up the exact number that called you: the lookup works on every US number, whether or not it has complaint history.
Is it getting worse?
FCC complaints about 357 numbers peaked in 2017 (13); the FTC's daily Do Not Call data has carried most of the volume since mid-2026.
FCC complaints per year
Years shown as '15 to '26; the current year is partial.
Carriers operating in 357
NANPA has assigned 9 357 prefixes (NPA-NXX central-office codes) across 9 rate centers: 11% to wireless carriers, 78% to landline and VoIP operators; 100% are pooled blocks shared by several carriers. 9 prefixes were assigned in the last 12 months (newest 2026-10-09). The carrier holding a prefix is who the number was issued through. It says nothing about who is calling, since caller ID is routinely spoofed.
| Carrier | Type | Prefixes | Rate centers | Newest assignment |
|---|---|---|---|---|
| Onvoy (Sinch) | Competitive / VoIP (CLEC) | 5(56%) | 5 | 2026-10-09 |
| Verizon Wireless (Cellco Partnership) | Wireless | 1(11%) | 1 | 2026-10-06 |
| Exiant Communications LLC | Competitive / VoIP (CLEC) | 1(11%) | 1 | 2026-09-18 |
| Opentact INC. | Unclassified | 1(11%) | 1 | 2026-09-18 |
| Wide Voice, LLC | Competitive / VoIP (CLEC) | 1(11%) | 1 | 2026-09-18 |
Largest rate centers (exchanges) by prefixes: Clovis (1), Firebaugh (1), Fresno (1), Hanford (1), Kingsburg (1), Lemoore (1), Sanger (1), Springville (1), Visalia (1). Source: NANPA Central Office Code Utilized Assignments (public, refreshed weekly).
What to do about calls from 357 numbers
Before you call back
Report it in California
- Unwanted sales calls and robocalls: donotcall.gov (FTC). Scams and fraud: ReportFraud.ftc.gov.
- Spoofing, texts and call-blocking problems: FCC consumer complaints.
- State complaints: California Attorney General.
- California formally adopted the FTC's National Do Not Call Registry as its own state list rather than running a separate one, so a single free registration at donotcall.gov covers you. State authorities can still enforce against telemarketers who ignore it, in addition to any federal penalty.
Your FTC and FCC reports are published (without your name or number) in the datasets this page is built from. How to report unwanted calls.
Area code 357: questions answered from the data
Where is area code 357?
Area code 357 serves Clovis, Visalia and Firebaugh, California, covering Fresno County, Tulare County and Kings County. It has been in service since March 26, 2025.
What time zone is area code 357 in?
Area code 357 is in the Pacific time zone (UTC−8, or UTC−7 during daylight saving time). The current local time is shown at the top of this page.
How do I report a 357 scam call in California?
Report unwanted sales calls and robocalls to the FTC at donotcall.gov, and scams to ReportFraud.ftc.gov. The FCC takes complaints at consumercomplaints.fcc.gov. In California, the California Attorney General also handles consumer complaints about scam calls. Reports feed the public data this page is built from.
Overlay and nearby area codes
Sources: FTC Do Not Call complaints (unverified consumer reports), published every weekday and available here from Jul 24; FCC Consumer Complaint Data, public record, imported nightly; NANPA numbering records. A number appearing here means consumers reported calls that displayed it. Caller ID can be spoofed.