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Area code
Area code 670 — Northern Mariana Islands
Northern Mariana Islands · in service since July 1, 1997
Area code 670 covers all of Northern Mariana Islands. No other area code overlays it.
Local time in Northern Mariana Islands
Spam reports from Sep 23 – Oct 22, 2026
Too few reports for a level #426 of 461
2 FTC complaints
Consumer reports, not verified by the FTC.
See the reports- Time zoneChamorro Standard Time (UTC+10)
- Local calls7 digits
- Prefixes51 assigned
- Runs out100+ years
- Unwanted call?Block & report
Spam call reports about 670 numbers
Complaints by week
Sep 11 – Oct 22, 2026Show as table
| Week starting | Complaints |
|---|---|
| Sep 7 (3 days) | 0 |
| Sep 14 | 1 |
| Sep 21 | 0 |
| Sep 28 | 1 |
| Oct 5 | 0 |
| Oct 12 | 1 |
| Oct 19 (4 days) | 0 |
Compared with all codes
- Robocalls
- 2 of 2
- Callers with the same code
- 0 of 3
- Rank by complaints
- #426of 461 · bottom tenth (fewest complaints)
- FCC complaints, Oct 2025 – Sep 2026
- 0
What the calls were about
Sep 11 – Oct 22, 2026
| Subject | Complaints | |
|---|---|---|
| Calls pretending to be government, businesses, or family and friends | 1 | |
| Reducing your debt (credit cards, mortgage, student loans) | 1 | |
| No subject given | 1 |
Where the people who complained live
Fewer than 5 complaints in the archive: not shown.
October 2026 (partial) report · most reported
Consumer reports, not verified by the FTC · source
Source: FTC Do Not Call complaints created Sep 11 – Oct 22, 2026. They are reported by consumers and are not verified by the FTC; caller ID can be spoofed (how we count).
Source: FCC Consumer Complaints data, unwanted calls filed Oct 1, 2025 – Sep 30, 2026, by caller ID; not verified by the FCC.
Area code 670 location and prefixes
| Exchange (NANPA) | Place | County | Prefixes |
|---|---|---|---|
| SAIPAN | — | — | 31 |
| ROTA | — | — | 2 |
| TINIAN | — | — | 2 |
Source: NANPA CO codes of Oct 23, 2026; places: U.S. Census Bureau, matched by DialWhere (how).
NANPA record
- Location
- Northern Mariana Islands
- Assigned by NANPA
- September 4, 1996
- Local dialing
- 7 digits (NANPA: 7D)
- NANPA planning letters
- PL-010
Source: NANPA, NPA database of Oct 24, 2026.
Is 670 running out of numbers?
Last dated forecast (October 2025, not current): 2110.
Source: NANPA NRUF forecast, April 2026 edition.
Who holds 670 prefixes
All five original holders
As listed by NANPA, not today’s carrier.
| Holder (as listed) | Prefixes | |
|---|---|---|
| Micronesian Telecommunications Corporation | 15 29% | |
| Pti Pacifica Inc. | 15 29% | |
| Multiple Ocn Listing | 9 18% | |
| 7 14% | ||
| Guam Wireless Telephone Company, LLC | 5 10% |
Source: NANPA CO codes of Oct 23, 2026.
Questions about area code 670
What area code is 670?
A Northern Mariana Islands area code, in service since July 1, 1997.
Where is 670 area code, and what time zone is it in?
Northern Mariana Islands; Chamorro Standard Time (UTC+10).
Why am I getting spam calls from 670?
2 FTC complaints from Sep 23 – Oct 22, 2026, most often about debt reduction (not verified by the FTC; caller ID can be spoofed).