npa-nxx | State | Company | OCN | Rate Center | CLLI | Assign Date | Misc |
312-644 | IL | ILLINOIS BELL TEL CO (AT&T) | 9329 | CHICGOZN01 | CHCGILIDDS2 | 00/00/0000 | Prefix Type: RBOC Switch Name: CHCG ILL DEAR DS2 Switch Type: 5ESS LATA: Chicago IL METRO (358) Tandem: CHCGILID71T Detailed Switch Info |