CHADWICK — IL
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL | 1183 | 1 |
| ONVOY, LLC | 224C | 1 |
| AERO NORTH COMMUNICATIONS, INC. - IL | 443F | 1 |
| CENTURYLINK COMMUNICATIONS, LLC | 508J | 1 |