340 Area Code — U.S. Virgin Islands
340 is a North American Numbering Plan area code for U.S. Virgin Islands, the United States. It covers about 0 people in 1 towns and 2 ZIP codes, including Frederiksted.
| Field | Value |
|---|---|
| Area code | 340 |
| Country | United States (+1) |
| State / province | U.S. Virgin Islands |
| Type | Standalone (no other NANP code covers the same towns) |
| Time zone | Atlantic |
| Population covered | 0 |
| Towns covered | 1 |
| ZIP codes | 2 |
| Approx. centre | 17.745, -64.829 |
Where area code 340 is used
Area code 340 is assigned to U.S. Virgin Islands, the United States, inside the North American Numbering Plan. Numbers in the code are written (340) NXX-XXXX at home and +1 340 NXX-XXXX when dialled from outside Canada and the United States. Since the NANP moved to 10-digit dialling you must always include the area code, even for a local call.
Towns and cities in area code 340
The 1 towns below are the largest in the 340 footprint, ranked by population. Every one of them links to its own page with the full list of area codes and ZIP codes for that town.
| Town | County | Population | ZIP codes |
|---|---|---|---|
| Frederiksted | St. Croix Island | — | 2 |
Counties covered
| County | ZIP codes |
|---|---|
| St. Croix Island | 1 |
Nearby area codes
How to dial area code 340
- Within North America: 340 + 7-digit number (340-NXX-XXXX). The leading 1 is optional on a mobile phone and required on most landlines for long-distance.
- From abroad: your country's international prefix, then 1, then 340, then the 7-digit number — for example 00 1 340 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 340?
340 is a North American Numbering Plan area code assigned to U.S. Virgin Islands, the United States. It covers about 0 people in 1 towns.
Is 340 a US or Canadian area code?
340 is a United States area code. Canada and the United States share the +1 country code, so both are part of the same numbering plan.
What time zone is area code 340 in?
Area code 340 is in the Atlantic time zone.
Do I have to dial 10 digits?
Yes. Every NANP call now requires the area code plus the seven-digit number, even for a local call.