Area code 837
Where the 837 area code is, its overlay and how to dial a +1 837 number from anywhere.
The 837 area code is in California, United States (Pacific (PT)). To call from abroad: +1 837 555-0123. It is an overlay, so all 10 digits are dialled.
The 837 area code is a geographic North American Numbering Plan (NANP) code covering California. It has been in service since 08-Jun-2023 and sits in the Pacific (PT) time zone.
How to dial a 837 number
+1 837 555-01231 837 555-0123837 555-0123Other California area codes
Frequently asked questions
Where is the 837 area code?
The 837 area code is in California, United States (Pacific (PT)).
Is 837 an overlay area code?
Yes. 837 overlays the same region as 530, so callers dial all 10 digits.
Do I have to dial 10 digits for 837?
Yes — dial the area code plus the seven-digit number.
How do I call a 837 number from another country?
Dial your exit code (or +), then 1, then 837, then the number: +1 837 555-0123.
Source: NANPA numbering plan. An area code covers a region, not a precise address — a 837 number does not pinpoint a street or ZIP code.
Who issues +1 837 numbers
Phone companies hold blocks of numbers in each area code. The main holders in 837:
About 0% of the 22 prefixes in use belong to mobile carriers: a 837 number is often a cell phone, and it may have moved to another carrier since.
Sources: FTC Do Not Call reported calls (numbers as reported by consumers, not verified), NANPA central office code assignments.
All US area codes United States +1 Map of area code 837 — cities & rate centres