The 670 area code belongs to the Commonwealth of the Northern Mariana Islands (CNMI) and some of the locations covered are Saipan, Tinian and more:
| US Territory | Larger cities in area code 670 | Time Zone |
|---|---|---|
| CNMI Commonwealth of the Northern Mariana Islands |
Aguijan, Rota, Saipan, Tinian | CNMI Current time is
07:25:13 AM |