Where is area code 357?

Area code 357 is in California. Its number blocks are assigned in 11 rate centres; the largest places include Clovis, Firebaugh, Fresno, Hanford, Kingsburg and Lemoore.

What time zone is area code 357?

Area code 357 is in Pacific Time.

Is area code 357 an overlay?

Yes. 357 shares its area with 559, so local calls need all 10 digits. It was added to relieve 559.

When did area code 357 start?

Area code 357 went into service on Mar 26, 2025, according to NANPA.

Are calls from area code 357 spam?

30 numbers in 357 have FTC Do Not Call complaints (31 in all), most often “Dropped call or no message”. Most numbers in an area code are ordinary lines, so look up the exact number that called you.

How do I check who called me from a 357 number?

Enter the full 10-digit number in the search box on this page, or go to canadial.com/lookup/357 followed by the 7 remaining digits.

Area code 357 — California

Area code 357 is in California; its 11 rate centres include Clovis, Firebaugh, Fresno, Hanford and Kingsburg. It overlays 559.

State: California
Time zone: Pacific Time · now —
In service since: Mar 26, 2025
Overlay: Yes, with 559
Created from: 559
Number blocks: 23 assigned, 0 unassigned of 23 in use or listed
Largest block holders: Onvoy, LLC, Exiant Communications LLC and Opentact Inc.

Area code facts: NANPA, Nov 3, 2026. Blocks: NANPA's CO code and thousands-block assignments, Nov 3, 2026. A block is assigned to a carrier; with number portability a number may have moved since.

Cities and rate centres in 357

By number blocks assigned there, largest first (11 rate centres in all). Names in capitals, like XXXXXXXXXX, are NANPA rate centre abbreviations with no exact Census place match.

XXXXXXXXXX 13
Clovis 1
DIR ASST 1
Firebaugh 1
Fresno 1
Hanford 1
Kingsburg 1
Lemoore 1
Sanger 1
SPRINGVL 1
Visalia 1

Carriers holding 357 blocks

Onvoy, LLC 5 · 22%
Exiant Communications LLC 1 · 4%
Opentact Inc. 1 · 4%
Verizon Wireless 1 · 4%
Wide Voice, LLC 1 · 4%

Assigned blocks held, of 23; 5 carriers in all.

Spam and robocall complaints about 357 numbers

30 numbers in 357 have 31 complaints with the FTC's Do Not Call registry since May 2022; 26 (84%) were about robocalls. The FCC has 25 unwanted-call complaints naming 20 357 numbers.

Top call types (FTC)

Dropped call or no message 4 · 13%
Reducing your debt (credit cards, mortgage, student loans) 3 · 10%
Medical & prescriptions 2 · 6%
Computer & technical support 1 · 3%

Complaints filed by consumers; neither agency verifies them. Share of all complaints; the rest named another type or none.

Most-reported numbers in 357

Recently reported 357 numbers

The numbers with the newest complaint or report, by the date of the call (FTC) or of the report.

Questions about area code 357

Where is area code 357?: Area code 357 is in California. Its number blocks are assigned in 11 rate centres; the largest places include Clovis, Firebaugh, Fresno, Hanford, Kingsburg and Lemoore.
What time zone is area code 357?: Area code 357 is in Pacific Time.
Is area code 357 an overlay?: Yes. 357 shares its area with 559, so local calls need all 10 digits. It was added to relieve 559.
When did area code 357 start?: Area code 357 went into service on Mar 26, 2025, according to NANPA.
Are calls from area code 357 spam?: 30 numbers in 357 have FTC Do Not Call complaints (31 in all), most often “Dropped call or no message”. Most numbers in an area code are ordinary lines, so look up the exact number that called you.
How do I check who called me from a 357 number?: Enter the full 10-digit number in the search box on this page, or go to canadial.com/lookup/357 followed by the 7 remaining digits.

Other area codes in California

All US and Canadian area codes · Spam calls in California · Is this number spoofed?

209 213 279 310 323 341 350 369 408 415 424 442 510 530 559 562 619 626 628 650 657 661 669 707 714 738 747 760 805 818 820 831 837 840 858 909 916 925 949 951