npa-nxx | State | Company | OCN | Rate Center | CLLI | Assign Date | Misc |
312-580 | IL | ILLINOIS BELL TEL CO (AT&T) | 9329 | CHICGOZN01 | CHCGILFRDS4 | 00/00/0000 | Prefix Type: RBOC Switch Name: CHCG FRANKLIN DS4 Switch Type: DMS100 LATA: Chicago IL METRO (358) Tandem: CHCGILID71T Detailed Switch Info |