| CITY | STATE | PHONE | CONNECTION |
| Pierre | SD | 605-945-3360 | V.34+, K56flex-V.90 |
| Rapid City | SD | 605-355-7660 | ISDN, V.34+, K56flex-V.90 |
| Sioux Falls | SD | 605-367-1880 | ISDN, V.34+, K56flex-V.90 |
| Watertown | SD | 605-884-3780 | ISDN, V.34+, K56flex-V.90 |
| Yankton | SD | 402-667-1020 | V.34+, K56flex-V.90 |