340 area code — Chtamstths, VI geographic
- State
- U.S. Virgin Islands
- Major area
- Chtamstths
- Time zone
- Atlantic
- In service since
- 1997-06-01
- Split from
- 809
- Active prefixes
- 58
- Rate centers
- 4
- Carriers
- 11
Area code 340 is a geographic code serving Chtamstths, U.S. Virgin Islands in the Atlantic time zone. It has been in service since June 1, 1997. Keep in mind the code identifies where the number was registered; the person calling may be elsewhere.
The code currently holds 58 working prefixes, held by 11 different carriers. Numbers are anchored to 4 rate centers — billing localities that fix where each prefix belongs.
The code was carved out of 809 (1997).
Local calls inside 340 are dialed 7D.
Worth noting: 340 is the only area code serving U.S. Virgin Islands.
Practical takeaway: the 340 label narrows geography to U.S. Virgin Islands, the prefix narrows it to a locality, and neither authenticates a caller. Verification means calling back through a number you found yourself.
Largest localities in 340
| Locality (rate center) | Active prefixes | Also served by |
|---|---|---|
| Chtamstths | 42 | — |
| St Croix | 7 | — |
| Chnstdstcr | 7 | — |
| Frkstdstcr | 2 | — |
FAQ
Is 340 a toll-free number?
No. 340 is a geographic code; calls are billed like any other domestic call. Toll-free codes are 800, 833, 844, 855, 866, 877 and 888.
Why am I getting spam calls from 340 numbers?
Scammers spoof recognizable area codes so calls look local or familiar. A displayed 340 number does not prove the call originated there — see our guide to spotting spoofed calls.
Where is a 340 number from?
340 is assigned to Chtamstths and surrounding areas of U.S. Virgin Islands in the Atlantic time zone. The three digits after the area code (the prefix) narrow it down to a rate center.