Area code 340 serves the United States Virgin Islands, including the islands of St. Thomas, St. Croix, and St. John. Introduced in 1997 as a split from area code 809, 340 is part of the North American Numbering Plan despite its Caribbean location. The area code supports a unique economy built on tourism, government, and small business. St. Thomas features a bustling cruise port and shopping district in Charlotte Amalie, while St. Croix hosts a blend of agriculture, oil refinery operations, and historic towns like Christiansted. St. John, known for its national park, offers eco-tourism and boutique resorts. The Virgin Islands rely heavily on tourism from the U.S. mainland, with flights and ferry systems connecting the islands. A 340 number signals a true island presence and is especially useful for local hotels, guides, property managers, or healthcare services catering to residents and travelers alike. For anyone doing business in the U.S. territories or building trust with locals, a 340 number adds credibility and regional authenticity.