| npa-nxx | State | Company | OCN | Rate Center | CLLI | Assign Date | Misc |
| 517-523 | MI | FRONTIER COMMUNICATIONS OF MICHIGAN, INC. (Frontier Communications) | 4417 | OSSEO | OSSEMIXIDS0 | 00/00/0000 | Prefix Type: ICO Switch Name: OSSEO Switch Type: Northern Telecom DMS10 (Digital) LATA: Lansing MI (346) Tandem: N/A Detailed Switch Info |
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Last Updated: Sat Nov 23 07:44:14 2024