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# Area Code 340: U.S. Virgin Islands

Area code 340 serves the United States Virgin Islands, an unincorporated territory of the United States located in the Caribbean. This area code was established in 2011 to replace the previous area code 340's predecessor, providing telecommunications coverage for the three main islandsSt. Croix, St. John, and St. Thomasas well as the surrounding smaller islands. The area code is part of the North American Numbering Plan (NANP), which allows the U.S. Virgin Islands to integrate seamlessly with the North American telephone system despite their geographic distance from the continental United States. Residents and businesses in the territory use the 340 area code for all local and long-distance calls, making it an essential component of communication infrastructure in this Caribbean jurisdiction.

The North American Numbering Plan is a standardized system that assigns three-digit area codes to geographic regions across North America, including the United States, Canada, and various U.S. territories. Area codes are designated by the North American Numbering Plan Administrator (NANPA) and the Federal Communications Commission (FCC), which work together to ensure efficient allocation and management of telephone numbers. The system organizes the 10-digit telephone number format (area code plus seven-digit local number) to facilitate routing calls to the correct destinations. By including the U.S. Virgin Islands under area code 340 within this system, the NANP ensures that residents and visitors can place calls using the same dialing conventions as the rest of North America, simplifying telecommunications and supporting economic connectivity for the territory.