saipan, northern mariana islands

Where Is Area Code 670?

Area code 670 serves the Commonwealth of the Northern Mariana Islands in the western Pacific Ocean. The code covers the full U.S. commonwealth, which is north of Guam and east of the Philippines. Saipan is the largest island and the main population center in the area code.

Area code 670 covers Saipan, Tinian, and Rota, which are the main inhabited islands of the commonwealth. Saipan includes communities such as Garapan, Susupe, and Capitol Hill. The Northern Mariana Islands do not have counties.

The area includes notable Pacific landmarks and natural features. Saipan is home to American Memorial Park and Mount Tapochau. The commonwealth also includes beaches, coral reefs, and volcanic islands spread across the Mariana archipelago.

History of Area Code 670

Area code 670 was created in 1997 when the Northern Mariana Islands separated from area code 671, which continues to serve Guam. Before that split, both Guam and the Northern Mariana Islands used 671 under the North American Numbering Plan.

Area code 670 has not had an overlay, and no later split has changed it. The code remains the single geographic area code for the Northern Mariana Islands. This separate code reflected the commonwealth’s own telecommunications identity within the U.S. numbering system.

Key Facts About Area Code 670

• Area code 670 serves the Commonwealth of the Northern Mariana Islands, a U.S. commonwealth in the western Pacific Ocean.
• Saipan is the best-known city and community associated with area code 670, and it is the largest island in the commonwealth.
• Area code 670 is in the Chamorro Standard Time zone, which is UTC+10 year-round.
• Area code 670 was established in 1997 after a split from area code 671, which serves Guam.
• Area code 670 is a geographic area code, not a toll-free code.
• The Northern Mariana Islands had a population of 47,329 at the 2020 U.S. Census.
• Northern Marianas College, the public college of the commonwealth, is located on Saipan and uses area code 670.
• American Memorial Park on Saipan is one of the best-known historic landmarks in area code 670.

Frequently Asked Questions

What state is area code 670 in?

Area code 670 is in the Commonwealth of the Northern Mariana Islands, a U.S. commonwealth rather than a state.

What major cities use area code 670?

Area code 670 serves Saipan, Tinian, and Rota, including communities such as Garapan, Susupe, and Capitol Hill.

Is area code 670 a toll-free number?

No. Area code 670 is a geographic area code.