Find any 670- phone number in Northern Mariana Islands

The 670 area code is the telephone area code for the Northern Mariana Islands, including the islands of Saipan, Tinian, and Rota. The area code was established in 1997 when the old Guam area code, 671, was split into two area codes. The 670 area code generally services the three most densely populated of the four main islands of the Northern Mariana Islands nation, including Saipan, Tinian, and Rota.

The North American Numbering Plan (NANP) is a system for assigning area codes and telephone numbers to the North American continent. It covers 25 countries in the Caribbean and North America and is managed by the NANPA, a subsidiary of Neustar, Inc. Area codes in the NANP follow a set pattern. The first digit indicates the geographic region, while the second and third digits indicate a sub-region or a more specific area of the geographic region, such as a state for a region that is in one state, like the 670 area code for the Northern Mariana Islands. Other codes indicate an area code split, whereby smaller geographic regions within an already assigned area code are assigned new area codes.