QWEST CORPORATION
104 prefixes in 605 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 605-988 | SIOUX FLS | 9631 | — | Yes |
| 605-995 | MITCHELL | 9631 | — | — |
| 605-996 | MITCHELL | 9631 | — | — |
| 605-997 | FLANDREAU | 9631 | — | Yes |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.