npa-nxx | State | Company | OCN | Rate Center | CLLI | Assign Date | Misc |
309-658 | IL | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL (Frontier Communications) | 1183 | HILLSDALE | HLDLILXDRS0 | 00/00/0000 | Prefix Type: ICO Switch Name: HILLSDALE Switch Type: Northern Telecom Remote Switching Center LATA: Davenport IA (634) Tandem: N/A Detailed Switch Info |