Area code 664

Area code 664 is a telephone area code in the North American Numbering Plan (NANP). It is used for the island of Montserrat, which is a British Overseas Territory in the Caribbean. It was created on July 1, 1996, as a split from area code 809. Before that, Montserrat was part of the area code 809, which was used for the whole Caribbean region.

664