279 area code
Where the 279 area code is, its overlay and how to dial a +1 279 number from anywhere.
The 279 area code is in California, United States (Pacific (PT)). To call from abroad: +1 279 555-0123. It is an overlay, so all 10 digits are dialled.
The 279 area code is a geographic North American Numbering Plan (NANP) code covering California. It has been in service since 09-Feb-2017 and sits in the Pacific (PT) time zone.
How to dial a 279 number
+1 279 555-01231 279 555-0123279 555-0123Other California area codes
Frequently asked questions
Where is the 279 area code?
The 279 area code is in California, United States (Pacific (PT)).
Is 279 an overlay area code?
Yes. 279 overlays the same region as 916, so callers dial all 10 digits.
Do I have to dial 10 digits for 279?
Yes — dial the area code plus the seven-digit number.
How do I call a 279 number from another country?
Dial your exit code (or +), then 1, then 279, then the number: +1 279 555-0123.
Source: NANPA numbering plan. An area code covers a region, not a precise address — a 279 number does not pinpoint a street or ZIP code.
Number holders in area code 279
Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 162 prefixes are in use in 279, shared by 28 companies. The largest holders:
| Company | Prefixes | Share |
|---|---|---|
| Fractel, LLC | 36 | 22% |
| Onvoy, LLC | 36 | 22% |
| T-Mobile USA, Inc. | 15 | 9% |
| New Cingular Wireless PCS, LLC | 13 | 8% |
| Multiple Ocn Listing | 9 | 6% |
| Bandwidth.Com CLEC, LLC | 7 | 4% |
Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.
Complaints about 279 numbers
- Reports to the FTC, last 30 days
- 224
- Recorded messages or robocalls
- 58%
- Rank among area codes
- #322 of 670
- Most reported subjects
- Other (106)
- Reducing your debt (credit cards, mortgage, student loans) (50)
- Calls pretending to be government, businesses, or family and friends (28)
Period Aug 26 – Sep 24, 2026. These are the numbers shown on the caller ID of the reported calls; many are spoofed and do not belong to the real caller.
Source: US Federal Trade Commission, Do Not Call reported calls data (daily files).
All US area codes United States +1 Map of area code 279 — cities & rate centres