| npa-nxx | State | Company | OCN | Rate Center | CLLI | Assign Date | Misc |
| 641-421 | IA | QWEST CORPORATION | 9631 | MASON CITY | MSCYIATCDS0 | 00/00/0000 | Prefix Type: RBOC Switch Name: MASON CITY Switch Type: DMS1/200 LATA: Des Moines IA (632) Tandem: MSCYIATC27T Detailed Switch Info |
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Last Updated: Thu May 8 03:56:56 2025