Area code 670
Telephone area code for the Commonwealth of the Northern Mariana Islands
Area code 670 is a telephone area code in the United States. It is used for the Northern Mariana Islands, which is a group of islands in the Pacific Ocean that are part of the United States Commonwealth. It covers all of the Northern Mariana Islands, including the main islands of Saipan, Tinian, and Rota. It was created on July 1, 1997.