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| npa-nxx | State | Company | OCN | Rate Center | CLLI | Assign Date | Misc |
| 563-203 | IA | CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA (Verizon Wireless) | 6570 | CRESCO | CDRRIADTX9X | 05/06/2004 | Prefix Type: WIRELESS Switch Name: N/A Switch Type: N/A LATA: N/A Tandem: N/A Detailed Switch Info |
| 563-313 | IA | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH (Iowa Telecom) | 1167 | CRESCO | CRESIAXOPS0 | 01/18/2012 | Prefix Type: ICO Switch Name: CRESCO Switch Type: N/A LATA: N/A Tandem: N/A Detailed Switch Info |
| 563-366 | IA | T-MOBILE USA, INC. (T-Mobile US, Inc) | 6529 | CRESCO | CDRRIAAX7MD | 04/28/2022 | Prefix Type: PCS Switch Name: N/A Switch Type: N/A LATA: N/A Tandem: N/A Detailed Switch Info |
| 563-400 | IA | FRACTEL, LLC | 965H | CRESCO | IWCYIA706MD | 12/17/2019 | Prefix Type: IPES Switch Name: N/A Switch Type: N/A LATA: N/A Tandem: N/A Detailed Switch Info |
| 563-547 | IA | WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH (Iowa Telecom) | 1167 | CRESCO | CRESIAXODS0 | 00/00/0000 | Prefix Type: ICO Switch Name: CRESCO Switch Type: N/A LATA: N/A Tandem: N/A Detailed Switch Info |