npa-nxx | State | Company | OCN | Rate Center | CLLI | Assign Date | Misc |
312-225 | IL | ILLINOIS BELL TEL CO (AT&T) | 9329 | CHICGOZN01 | CHCGILCADS1 | 00/00/0000 | Prefix Type: RBOC Switch Name: CHCG CALUMET DS1 Switch Type: DMS100 LATA: Chicago IL METRO (358) Tandem: CHCGILST55T Detailed Switch Info |