US numbering directory
Northern Mariana Islands Area Codes
Compare 1 in-service area codes assigned to Northern Mariana Islands. Explore each code’s introduction date, overlays, possible time zones, and public prefix records.
Northern Mariana Islands numbering at a glance
- In-service area codes
- 1
- Time-zone labels in NANPA data
- UTC+10
- Listed in-service or assigned prefixes
- 35 · source dated 2026-09-29
These are numbering assignments. The counts do not represent active phone numbers, current carriers, or a caller’s physical location.
Compare area codes in Northern Mariana Islands
| Code | Introduced | Other codes in overlay | Time zones | Listed prefixes |
|---|---|---|---|---|
| 670 | 01-Jul-1997 | None listed | UTC+10 | 35 |
Source: NANPA NPA database, dated 2026-09-28. Prefix counts: NANPA US assignment report. View official area-code maps.
Find a number in Northern Mariana Islands
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