357 area code
Where the 357 area code is, its overlay and how to dial a +1 357 number from anywhere.
The 357 area code is in California, United States (Pacific (PT)). To call from abroad: +1 357 555-0123. It is an overlay, so all 10 digits are dialled.
The 357 area code is a geographic North American Numbering Plan (NANP) code covering California. It has been in service since 19-Dec-2023 and sits in the Pacific (PT) time zone.
How to dial a 357 number
+1 357 555-01231 357 555-0123357 555-0123Other California area codes
Frequently asked questions
Where is the 357 area code?
The 357 area code is in California, United States (Pacific (PT)).
Is 357 an overlay area code?
Yes. 357 overlays the same region as 559, so callers dial all 10 digits.
Do I have to dial 10 digits for 357?
Yes — dial the area code plus the seven-digit number.
How do I call a 357 number from another country?
Dial your exit code (or +), then 1, then 357, then the number: +1 357 555-0123.
Source: NANPA numbering plan. An area code covers a region, not a precise address — a 357 number does not pinpoint a street or ZIP code.
Number holders in area code 357
Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 14 prefixes are in use in 357, shared by 1 companies. The largest holders:
| Company | Prefixes | Share |
|---|---|---|
| Multiple Ocn Listing | 14 | 100% |
Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.
All US area codes United States +1 Map of area code 357 — cities & rate centres