340 Area Code: Charlotte Amalie, Virgin Islands

The 340 area code serves the United States Virgin Islands, a US territory in the eastern Caribbean east of Puerto Rico. Charlotte Amalie, the territorial capital and largest settlement, anchors the directory's records here. Charlotte Amalie sits on the south shore of St. Thomas in a deep horseshoe-shaped harbor that has anchored the town since the seventeenth century — the harbor was a Danish trading port for nearly two centuries before the United States purchased the islands in 1917, and the surrounding hillside neighborhoods retain a substantial cluster of pre-American architecture. The 340 designation joins the territory to the same dialing framework used across the United States.

Because 340 covers a small territory and has limited overlap with the public-record sources that drive much of our cross-city linkage in the fifty states, the directory does not currently surface a recurring set of secondary cities for this code. Where other-place names do appear, they reflect the same kinds of public-record dynamics seen elsewhere — numbers porting between carriers, addresses tied to multiple jurisdictions, and prior registrations surfacing alongside current ones. The directory currently documents 20 distinct prefixes within 340 in detail, a working subset of the prefix population the code actually carries.

Demographic figures we use to compare cities to US medians are not represented in our data for the Virgin Islands in the same form as for the fifty states, and the standard four-metric profile is not currently available for Charlotte Amalie. The territory's overall population has historically counted in the range of 100,000 across the three main inhabited islands of St. Thomas, St. Croix, and St. John.