670 area code
Area code 670 is in Northern Mariana Islands. It covers Rota, Saipan and Tinian: 3 ZIP codes in Rota Municipality, Saipan Municipality and Tinian Municipality. Local time there is , Chamorro Time. In service since 1997, with no overlay.
- Time zone
- Chamorro
- Largest city
- Rota
- Overlays
- none
- In service since
- 1997
- Rate centres
- 3
- Prefixes assigned
- 35 (350,000 numbers)
Who calls from a 670 number
NANPA records the carrier each block of 670 numbers is assigned to. Of the 350,000 670 numbers assigned, 86% are with cable, internet-calling, business and other carriers (Micronesian Telecommunications and PTI Pacifica); 14% with mobile carriers (Guam Wireless Telephone Company).
That is who the numbers were assigned to: people keep their number when they change carrier, so any one number may have moved since.
| Carrier | Kind | Share |
|---|---|---|
| Micronesian Telecommunications | Cable, VoIP, other | 43% |
| PTI Pacifica | Cable, VoIP, other | 43% |
| Guam Wireless Telephone Company | Mobile | 14% |
An area code says where a number was issued, not where the caller is: people keep their numbers when they move, and caller ID can be set to show any number, which the FCC calls spoofing. If a call you did not expect asks for money or personal details, the FCC advises hanging up and calling the company back on a number you look up yourself. Unwanted calls can be reported to the FTC at ReportFraud.ftc.gov.
Places in area code 670
The 3 places with a telephone rate centre of their own using 670, largest first. Each links to its ZIP codes.
| Place | ZIP codes | Population |
|---|---|---|
| Rota, MP | 1 | — |
| Saipan, MP | 1 | — |
| Tinian, MP | 1 | — |
ZIP codes in area code 670
3 ZIP codes in 3 towns, by the town each is mailed to, largest first. Each links to its own page.
Where 670 numbers are issued
NANPA's rate centres with the most 670 prefixes (each prefix is 10,000 numbers), under NANPA's own abbreviated names.
| Rate centre | Place | Prefixes |
|---|---|---|
SAIPAN | Saipan | 31 |
ROTA | Rota | 2 |
TINIAN | Tinian | 2 |
Counties
The counties of its ZIP codes, most residents first, with how many of its ZIP codes each has.
Which code covers where you are now? What area code am I in? answers from your location.
Questions about area code 670
Where is area code 670?
Area code 670 is in Northern Mariana Islands. It covers Rota, Saipan and Tinian: 3 ZIP codes in Rota Municipality, Saipan Municipality and Tinian Municipality.
What ZIP codes are in area code 670?
3 ZIP codes, by the town each is mailed to: Rota (96951), Saipan (96950), Tinian (96952). The full list is on this page.
What time zone is area code 670 in?
Chamorro time.
Is a 670 number a mobile or a landline?
It can be either. 14% of 670 numbers are assigned to mobile carriers and 0% to local phone companies (NANPA, 2026-10-10); the rest are with cable, internet-calling, business and paging carriers. A number keeps its area code when it moves to another carrier.
Does a 670 number mean the caller is in Northern Mariana Islands?
Not necessarily. An area code says where the number was first issued. People keep their numbers when they move or switch carriers, and calling software can show any number, so a 670 call can come from anywhere.
Source: NANPA NPA database, central office code and thousands-block assignments, 2026-10-10. Places are matched to NANPA's rate centres by name; see sources.
Cite this page
zipcodes.pro. “Area code 670.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/area-code/670
Underlying data is public domain or openly licensed — sources, vintages and licences.