670 Area Code

Where is the 670 area code?

670 is a Northern Mariana Islands area code covering all of the Northern Mariana Islands, including Saipan, Tinian and Rota. In the wider directory it sits in the U.S. Territories region.

Cities in the 670 area code

• Saipan
• Garapan
• Susupe
• Chalan Kanoa
• San Antonio
• Koblerville
• Capitol Hill
• Tanapag
• Kagman
• San Jose
• Songsong

See 670 on the area code map →

Dialing 670

Saipan, MP is currently served by the single area code 670, with no overlay. Ten-digit dialing (area code + seven-digit number) always works and is increasingly the norm nationwide; some local calls may still connect with seven digits. If a future overlay is added, 10-digit dialing would become mandatory.

From outside the US, dial +1 670 followed by the seven-digit number.

History of the 670 area code

670 went into service on July 1, 1997. It serves Saipan and the surrounding part of Northern Mariana Islands. For how codes are created, split, and overlaid, see how area codes work.

Is 670 a scam or spam risk?

670 is a legitimate geographic area code, not a premium or toll line, so a call from it costs you nothing extra. That said, scammers frequently spoof real local area codes to look familiar on caller ID. A genuine 670 number on your screen is no guarantee the caller is in Saipan, MP or trustworthy. See spam & scam-risk area codes for how spoofing works and how to respond.

Explore more

See every code in Northern Mariana Islands, compare codes across the U.S. Territories region, or view all Chamorro Time codes. You can also browse the 6XX block or the complete numeric list of US area codes.

New to how this all works? Start with how area codes work, then read up on overlays, 10-digit dialing, and spam & scam-risk codes. To check another number, use the area code lookup tool.