Area code 671 — Guam
Area code 671 is in Guam. Time zone, overlays, counties and ZIP codes.
| Location | Guam (includes Andersen Air Force Base) |
|---|---|
| State | Guam |
| Status | In service · since 1997 |
| Time zone | Chamorro · |
| Local dialing | 10 digits |
History
- Created for membership in NANP
- 671 was the former country code for the island
Counties (approximate)
Guam
ZIP codes in area code 671
Approximate: area code boundaries follow telephone rate centers, not ZIP codes.
Format a 671 number
US numbers are written as (671) 555-0123 or 671-555-0123. From outside the US, dial +1 671 555 0123.
Is a call from 671 a scam?
An area code only tells you where a number was assigned. Caller ID can be faked (“spoofed”), so do not trust a call just because the area code looks local. Never share codes or payment details with unexpected callers.
Sources: NANPA via NumberResearch.org (CC BY 4.0); place names and history from Wikipedia (CC BY-SA 4.0). See data sources.