Area code 670: where it is and who calls from it
Area code 670 is in Northern Mariana Islands.
Northern Mariana Islands (all)
| Where | Northern Mariana Islands |
|---|---|
| Time zone | Chamorro (Guam) Time ยท local time |
| In service since | 1997 |
| Overlay | No |
| Prefixes assigned | 35 of 792 possible (4%) |
Where 670 numbers started
Every prefix is assigned to a rate center, the local calling area it was set up in. These are the biggest in 670, with how many prefixes each has.
Who holds 670 numbers
- Mobile carrier 14%
- Phone company 86%
| Carrier | Type | Prefixes | Share |
|---|---|---|---|
| Micronesian Telecommunications | Phone company | 15 | 43% |
| Pti Pacifica | Phone company | 15 | 43% |
| Guam Wireless Telephone | Mobile carrier | 5 | 14% |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number.
States served: Northern Mariana Islands.
Got a call from 670?
An area code tells you where a number was first assigned, not where the caller is. People keep their numbers when they move, and scammers can fake any number. If you weren't expecting the call, let it go to voicemail.
If the call shows a 670 number that matches the first six digits of your own, that's often neighbor spoofing. Use the box above to check the full number.
Area code facts from the NANPA area code database (updated 10/06/2026); prefixes and carriers from NANPA's central office code records (updated 2026-10-10). Place description adapted from Wikipedia, CC BY-SA 4.0.