Area Code 340: St. Thomas, US Virgin Islands
340 is a telephone area code serving US Virgin Islands, including St. Thomas, St. Croix. It is part of the North American Numbering Plan and is dialed with the country code +1.
Numbers beginning with 340 are located in US Virgin Islands, United States (NANP region: Territory). The code covers St. Thomas, St. Croix.
How to Dial Area Code 340
| Calling from | What to dial |
|---|---|
| Anywhere in the US or Canada | 1 340 XXX-XXXX (10-digit dialing: 340 + 7-digit number) |
| Local call inside the same area code | 7-digit number in most areas; 10 digits where an overlay code is active |
| From the UK or Europe | 00 1 340 XXX XXXX |
| From Australia | 0011 1 340 XXX XXXX |
| From a mobile phone anywhere | +1 340 XXX XXXX |
Whatever country you are calling from, the + symbol replaces the exit code. Save the contact as +1 340 XXXXXXX and it will dial correctly from any phone in the world.
Time Zone for Area Code 340
Calls to a 340 number ring in the America/St_Thomas time zone, standard offset UTC-04:00. This zone does not observe daylight saving time, so the offset above holds all year.
Note: the US Virgin Islands do not observe daylight saving time.
Cities and Communities Served by 340
The following places fall inside the 340 calling area:
Other Area Codes in US Virgin Islands
These codes also serve US Virgin Islands. Area codes are assigned by the North American Numbering Plan Administration (NANPA).
| Area Code | Cities / Coverage |
|---|
See all 1 area codes in US Virgin Islands →
Frequently Asked Questions
Where is area code 340?
Area code 340 is in US Virgin Islands, United States. It covers St. Thomas, St. Croix.
What time zone is area code 340 in?
Area code 340 rings in the America/St_Thomas time zone (UTC-04:00 standard).
Do I need to dial 1 before area code 340?
Yes, for a long-distance call inside the US and Canada you dial 1 first, then 340, then the seven-digit number. The 1 is the North American long-distance trunk prefix — it is not the country code. From outside North America you dial your exit code then 1 then 340.
Is area code 340 toll-free?
No. 340 is a standard geographic area code, so normal long-distance rates apply unless your plan includes them. Toll-free NANP codes are 800, 833, 844, 855, 866, 877 and 888.