How to call the US Virgin Islands from the USA or from Canada:

dial 1 + 340 + local phone number

Calling from another country?

The time in the US Virgin Islands is now 09:45:27pm

Calling the US Virgin Islands from the United States explained:

1 - Country Code for the US Virgin Islands
340 - area code within the NANP
local phone number - 7 digits
US to the US Virgin Islands international dialing format: 1 340 ??? ????
this US territory is part of the North American Numbering Plan - NANP (calling it works like a US state to state call)

Phone Books:

VIPhoneBook.com - USVI White and Yellow Pages