| 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 |
|---|---|---|---|
| 671-563 | Hagatna | Guam | Landline |
| 671-487 | Agana Heights | Guam | Landline |
| 671-988 | Hagatna | Guam | Wireless |
| 671-989 | Agana Heights | Guam | Landline |
| 671-635 | Hagatna | Guam | Landline |