671 area code
Where the 671 area code is, its overlay and how to dial a +1 671 number from anywhere.
The 671 area code is in Guam, United States ((UTC+10)). To call from abroad: +1 671 555-0123.
The 671 area code is a geographic North American Numbering Plan (NANP) code covering Guam. It has been in service since 05-Aug-1996 and sits in the (UTC+10) time zone.
How to dial a 671 number
+1 671 555-01231 671 555-0123671 555-0123Frequently asked questions
Where is the 671 area code?
The 671 area code is in Guam, United States ((UTC+10)).
Do I have to dial 10 digits for 671?
Yes — dial the area code plus the seven-digit number.
How do I call a 671 number from another country?
Dial your exit code (or +), then 1, then 671, then the number: +1 671 555-0123.
Source: NANPA numbering plan. An area code covers a region, not a precise address — a 671 number does not pinpoint a street or ZIP code.
Number holders in area code 671
Each prefix (the three digits after the area code) is assigned by NANPA to one telephone company. 128 prefixes are in use in 671, shared by 11 companies. The largest holders:
| Company | Prefixes | Share |
|---|---|---|
| Teleguam Holdings, LLC | 53 | 41% |
| 24 | 19% | |
| Pti Pacifica Inc. | 19 | 15% |
| Guam Wireless Telephone Company, LLC | 14 | 11% |
| Multiple Ocn Listing | 9 | 7% |
| Choice Phone, LLC Dba Iconn | 2 | 2% |
Source: NANPA central office code assignments. A number keeps its original prefix when it is ported to another carrier.
All US area codes United States +1 Map of area code 671 — cities & rate centres