Area Code Atlas

NANP-Introduction of New 340 (U.S. Virgin Islands) Numbering Plan Area (NPA)

Permissive dialing period for area code 340

A permissive dialing period for area code 340 began on June 1, 1997, allowing calls to be completed using either the old 809 area code or the new 340 code in the U.S. Virgin Islands. This period lasted until June 30, 1998.

Area code 340 created by split from 809

In 1998, area code 340 was created by splitting from area code 809. This change assigned a distinct area code to the U.S. Virgin Islands, separating it from the broader Caribbean numbering plan area.

Area code 340 split from 809

Area code 340 was created on July 1, 1998, by splitting from the Caribbean area code 809 to serve the U.S. Virgin Islands exclusively. This change ended the permissive dialing period and required ten-digit dialing for calls from other NANP countries.