| npa-nxx | State | Company | FRN | RMD | OCN | Rate Center | CLLI | Assign Date | Misc |
| 309-754 | IL | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL (Frontier Communications) | N/A | 1183 | MATHERVL | MTVLILXDRS0 | 00/00/0000 | Prefix Type: ICO Switch Name: MATHERVILLE Switch Type: Northern Telecom DMS10 RSLE LATA: Davenport IA (634) Tandem: N/A Detailed Switch Info |
