SIGEL — IL
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| ILLINOIS CONSOLIDATED TEL. CO. | 1037 | 1 |
| MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | 1 |
Data last updated: March 10, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| ILLINOIS CONSOLIDATED TEL. CO. | 1037 | 1 |
| MEDIACOM TELEPHONY OF ILLINOIS, LLC - IL | 846F | 1 |