QWEST CORPORATION
30 prefixes in 641 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 641-228 | CHARLES CY | 9631 | — | Yes |
| 641-257 | CHARLES CY | 9631 | — | Yes |
| 641-324 | NORTHWOOD | 9631 | — | Yes |
| 641-380 | MASON CITY | 9631 | — | — |
| 641-421 | MASON CITY | 9631 | — | — |
| 641-422 | MASON CITY | 9631 | — | — |
| 641-423 | MASON CITY | 9631 | — | — |
| 641-424 | MASON CITY | 9631 | — | — |
| 641-428 | MASON CITY | 9631 | 2010-08-18 | Yes |
| 641-435 | NASHUA | 9631 | — | Yes |
| 641-454 | MANLY | 9631 | — | Yes |
| 641-456 | HAMPTON | 9631 | — | Yes |
| 641-458 | GENEVA | 9631 | — | Yes |
| 641-494 | MASON CITY | 9631 | — | Yes |
| 641-632 | ROSE HILL | 9631 | — | Yes |
| 641-648 | IOWA FALLS | 9631 | — | — |
| 641-672 | OSKALOOSA | 9631 | — | Yes |
| 641-673 | OSKALOOSA | 9631 | — | — |
| 641-682 | OTTUMWA | 9631 | — | — |
| 641-683 | OTTUMWA | 9631 | — | — |
| 641-684 | OTTUMWA | 9631 | — | — |
| 641-732 | OSAGE | 9631 | — | Yes |
| 641-752 | MARSHALLTN | 9631 | 2001-04-24 | — |
| 641-753 | MARSHALLTN | 9631 | 2001-04-24 | — |
| 641-754 | MARSHALLTN | 9631 | 2001-04-24 | — |
| 641-843 | BRITT | 9631 | — | Yes |
| 641-844 | MARSHALLTN | 9631 | — | Yes |
| 641-847 | ACKLEY | 9631 | — | Yes |
| 641-854 | MARSHALLTN | 9631 | 2015-03-09 | Yes |
| 641-923 | GARNER | 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.