ILLINOIS BELL TEL CO
157 prefixes in 815 · initial assignments from the NANPA CO code file, 09/17/2026
| NPA-NXX | Rate center | OCN | Assigned | Pooled |
|---|---|---|---|---|
| 815-695 | NEWARK | 9329 | — | Yes |
| 815-720 | ROCKFORD | 9329 | — | — |
| 815-722 | JOLIET | 9329 | — | — |
| 815-723 | JOLIET | 9329 | — | — |
| 815-724 | JOLIET | 9329 | — | — |
| 815-725 | JOLIET | 9329 | — | — |
| 815-726 | JOLIET | 9329 | — | — |
| 815-727 | JOLIET | 9329 | — | — |
| 815-729 | JOLIET | 9329 | — | — |
| 815-730 | JOLIET | 9329 | — | — |
| 815-731 | PLAINFIELD | 9329 | 2006-02-16 | Yes |
| 815-736 | LISBON | 9329 | — | Yes |
| 815-740 | JOLIET | 9329 | — | — |
| 815-741 | JOLIET | 9329 | — | — |
| 815-744 | JOLIET | 9329 | — | — |
| 815-759 | MCHENRY | 9329 | — | — |
| 815-768 | JOLIET | 9329 | — | Yes |
| 815-773 | JOLIET | 9329 | — | — |
| 815-774 | JOLIET | 9329 | — | — |
| 815-776 | GALENA | 9329 | — | Yes |
| 815-777 | GALENA | 9329 | — | — |
| 815-788 | CRYSTAL LK | 9329 | 2001-03-22 | Yes |
| 815-792 | HARDING | 9329 | — | Yes |
| 815-802 | KANKAKEE | 9329 | 2001-09-28 | Yes |
| 815-806 | FRANKFORT | 9329 | — | Yes |
| 815-834 | LOCKPORT | 9329 | — | Yes |
| 815-836 | LOCKPORT | 9329 | — | Yes |
| 815-838 | LOCKPORT | 9329 | — | — |
| 815-877 | ROCKFORD | 9329 | — | — |
| 815-883 | OGLESBY | 9329 | — | Yes |
| 815-886 | LOCKPORT | 9329 | — | — |
| 815-921 | ROCKFORD | 9329 | 2001-04-27 | Yes |
| 815-923 | UNION | 9329 | — | Yes |
| 815-928 | KANKAKEE | 9329 | — | — |
| 815-929 | KANKAKEE | 9329 | — | — |
| 815-932 | KANKAKEE | 9329 | — | — |
| 815-933 | KANKAKEE | 9329 | — | — |
| 815-935 | KANKAKEE | 9329 | — | — |
| 815-936 | KANKAKEE | 9329 | — | — |
| 815-937 | KANKAKEE | 9329 | — | — |
| 815-939 | KANKAKEE | 9329 | — | — |
| 815-941 | MORRIS | 9329 | — | — |
| 815-942 | MORRIS | 9329 | — | — |
| 815-943 | HARVARD | 9329 | — | — |
| 815-944 | MOMENCE | 9329 | — | Yes |
| 815-961 | ROCKFORD | 9329 | — | — |
| 815-962 | ROCKFORD | 9329 | — | — |
| 815-963 | ROCKFORD | 9329 | — | — |
| 815-964 | ROCKFORD | 9329 | — | — |
| 815-965 | ROCKFORD | 9329 | — | — |
| 815-966 | ROCKFORD | 9329 | — | — |
| 815-967 | ROCKFORD | 9329 | — | — |
| 815-968 | ROCKFORD | 9329 | — | — |
| 815-969 | ROCKFORD | 9329 | — | Yes |
| 815-971 | ROCKFORD | 9329 | — | — |
| 815-972 | ROCKFORD | 9329 | — | — |
| 815-987 | ROCKFORD | 9329 | — | — |
These are initial assignees from NANPA CO-code records — because of number portability, the current serving carrier of individual numbers may differ. Bulk export requires a membership.