GUAM AND THE NORTHERN MARIANA ISLANDS · AREA CODE GUIDE
671 and 670 area codes location: Guam and the Northern Mariana Islands
- Local date and time
- Chamorro Time
Map data: UCLA Geoportal (2015) · NANPA · US Census Bureau, checked 26 September 2026. Boundaries are approximate.
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Download the 671 area code map
Guam and the Northern Mariana Islands area codes at a glance
- Area codes
- 2
- Time zones
- Chamorro Time (no daylight saving)
- Country code
- +1, as in the US and Canada
Area codes
| Area code | Place | Time zone | In service since | How it began |
|---|---|---|---|---|
| 671 | Guam | Chamorro Time (no daylight saving) | 1 July 1997 | Started service |
| 670 | Northern Mariana Islands | Chamorro Time (no daylight saving) | 1 July 1997 | Started service |
Source: NANPA's area code data, retrieved 26 September 2026.
Business phone numbers in area codes 671 and 670, answered by an AI agent
A local number for Guam and the Northern Mariana Islands, with an AI receptionist that takes caller details, answers the questions you give it, and books appointments. Numbers depend on what carriers have left.