Guam phone numbers and area codes
Guam has 1 area code and 95 assigned prefixes.
Look at a prefix's carrier mix below, or look up a full number on the home page.
- Mobile carrier 15%
- Phone company 85%
Area codes in Guam
| Code | Area | Prefixes here |
|---|---|---|
| 671 | Guam (includes Andersen Air Force Base) | 95 |
Biggest local calling areas
Numbers are assigned to rate centers. These have the most prefixes in Guam (the number is how many).
Carriers in Guam
| Carrier | Type | Prefixes | Share |
|---|---|---|---|
| Teleguam Holdings | Phone company | 53 | 56% |
| Pti Pacifica | Phone company | 19 | 20% |
| Guam Wireless Telephone | Mobile carrier | 14 | 15% |
| IT&E | Phone company | 3 | 3% |
| Pacific Data Systems | Phone company | 2 | 2% |
| Iconn | Phone company | 2 | 2% |
| Docomo Pacific | Phone company | 2 | 2% |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.