Area code 340
Where the 340 area code is, its overlay and how to dial a +1 340 number from anywhere.
The 340 area code is in U.S. Virgin Islands, United States (Alaska (AKT)). To call from abroad: +1 340 555-0123.
The 340 area code is a geographic North American Numbering Plan (NANP) code covering U.S. Virgin Islands. It has been in service since 29-Apr-1997 and sits in the Alaska (AKT) time zone.
How to dial a 340 number
+1 340 555-01231 340 555-0123Frequently asked questions
Where is the 340 area code?
The 340 area code is in U.S. Virgin Islands, United States (Alaska (AKT)).
Do I have to dial 10 digits for 340?
Local calls within 340 may use seven digits; ten-digit dialling always works.
How do I call a 340 number from another country?
Dial your exit code (or +), then 1, then 340, then the number: +1 340 555-0123.
Source: NANPA numbering plan. An area code covers a region, not a precise address — a 340 number does not pinpoint a street or ZIP code.
Missed a call from +1 340?
In the 30 days to September 24, 2026, 7 unwanted calls showing a 340 number were reported to the US Federal Trade Commission, 86% of them recorded messages or robocalls. That puts 340 at #414 of 670 area codes reported.
- If you do not know anyone in U.S. Virgin Islands, do not call back: a genuine caller will leave a message or send a text.
- Scammers fake the number shown on caller ID, so a 340 number can hide a caller anywhere in the world.
- Never give a code received by text or a bank detail to an unknown caller. In the US, calls can be reported at reportfraud.ftc.gov.
Who issues +1 340 numbers
Phone companies hold blocks of numbers in each area code. The main holders in 340:
About 8.6% of the 81 prefixes in use belong to mobile carriers: a 340 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 340 — cities & rate centres