WILMINGTON — IL
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| AT&T ENTERPRISES, LLC | 516C | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | 1 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | 1 |
| ILLINOIS BELL TEL CO | 9329 | 1 |
| BANDWIDTH.COM CLEC, LLC - IL | 984E | 1 |