| General Information about Area Code 671 | |
|---|---|
| Country | United States |
| State / Province / Territory | Guam |
| Major City | Agana Heights |
| Time Zone | UTC+10:00 |
| Prefix | Primary City | County | Phone Type |
|---|---|---|---|
| 671-848 | Agana Heights | Guam | Wireless |
| 671-644 | Hagatna | Guam | Landline |
| 671-687 | Hagatna | Guam | Wireless |
| 671-488 | Hagatna | Guam | Wireless |
| 671-400 | Agana Heights | Guam | Landline |
| 671-642 | Hagatna | Guam | Landline |
| 671-735 | Hagatna | Guam | Landline |
| 671-971 | Agana Heights | Guam | Landline |
| 671-654 | Hagatna | Guam | Landline |
| 671-797 | Agana Heights | Guam | Wireless |
| 671-777 | Hagatna | Guam | Wireless |
| 671-688 | Hagatna | Guam | Wireless |
| 671-653 | Hagatna | Guam | Landline |
| 671-977 | Agana Heights | Guam | Wireless |
| 671-727 | Hagatna | Guam | Wireless |
| 671-362 | Hagatna | Guam | Landline |
| 671-471 | Hagatna | Guam | Landline |
| 671-726 | Hagatna | Guam | Landline |
| 671-838 | Santa Rita | Guam | Wireless |
| 671-689 | Hagatna | Guam | Wireless |