Phone numbers in Saipan, Northern Mariana Islands
Saipan has 31 phone prefixes in area code 670.
Biggest holders: Pti Pacifica, Micronesian Telecommunications, Guam Wireless Telephone. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 10%
- Phone company 90%
Every prefix in Saipan
Search the first six digits of a number in this list. If it's here, the number started in Saipan with the carrier shown. If it isn't, check the Northern Mariana Islands page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 670-233 | Micronesian Telecommunications | Phone company | – |
| 670-234 | Micronesian Telecommunications | Phone company | – |
| 670-235 | Micronesian Telecommunications | Phone company | – |
| 670-236 | Micronesian Telecommunications | Phone company | – |
| 670-237 | Micronesian Telecommunications | Phone company | 2005 |
| 670-256 | Micronesian Telecommunications | Phone company | – |
| 670-284 | Pti Pacifica | Phone company | 2018 |
| 670-285 | Pti Pacifica | Phone company | 2005 |
| 670-286 | Pti Pacifica | Phone company | – |
| 670-287 | Pti Pacifica | Phone company | – |
| 670-288 | Micronesian Telecommunications | Phone company | – |
| 670-321 | Micronesian Telecommunications | Phone company | – |
| 670-322 | Micronesian Telecommunications | Phone company | – |
| 670-323 | Micronesian Telecommunications | Phone company | – |
| 670-328 | Micronesian Telecommunications | Phone company | – |
| 670-483 | Guam Wireless Telephone | Mobile carrier | – |
| 670-484 | Guam Wireless Telephone | Mobile carrier | 2002 |
| 670-664 | Micronesian Telecommunications | Phone company | – |
| 670-682 | Micronesian Telecommunications | Phone company | – |
| 670-783 | Pti Pacifica | Phone company | 2013 |
| 670-785 | Pti Pacifica | Phone company | 2010 |
| 670-788 | Pti Pacifica | Phone company | – |
| 670-789 | Pti Pacifica | Phone company | 2007 |
| 670-838 | Pti Pacifica | Phone company | 2004 |
| 670-848 | Pti Pacifica | Phone company | 2008 |
| 670-858 | Pti Pacifica | Phone company | 2008 |
| 670-868 | Pti Pacifica | Phone company | 2003 |
| 670-878 | Pti Pacifica | Phone company | 2005 |
| 670-888 | Pti Pacifica | Phone company | 2002 |
| 670-898 | Pti Pacifica | Phone company | 2004 |
| 670-989 | Guam Wireless Telephone | Mobile carrier | 2005 |
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. Source: NANPA central office code records, 2026-10-10.