| 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 |
|---|---|---|---|
| 671-475 | Hagatna | Guam | Landline |
| 671-638 | Hagatna | Guam | Landline |
| 671-979 | Agana Heights | Guam | Landline |
| 671-456 | Hagatna | Guam | Landline |
| 671-632 | Hagatna | Guam | Landline |
| 671-483 | Hagatna | Guam | Wireless |
| 671-343 | Hagatna | Guam | Landline |
| 671-987 | Agana Heights | Guam | Wireless |
| 671-828 | Hagatna | Guam | Landline |
| 671-922 | Agana Heights | Guam | Landline |
| 671-789 | Hagatna | Guam | Landline |
| 671-477 | Hagatna | Guam | Landline |
| 671-648 | Hagatna | Guam | Landline |
| 671-788 | Hagatna | Guam | Wireless |
| 671-480 | Agana Heights | Guam | Wireless |
| 671-478 | Hagatna | Guam | Landline |
| 671-562 | Hagatna | Guam | Landline |
| 671-878 | Agana Heights | Guam | Wireless |
| 671-898 | Santa Rita | Guam | Wireless |
| 671-734 | Hagatna | Guam | Landline |