TROY — IL
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| CENTURYLINK COMMUNICATIONS, LLC | 508J | 1 |
| TON80 COMMUNICATIONS, LLC | 516J | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | 1 |
| T-MOBILE USA, INC. | 6529 | 1 |
| ILLINOIS BELL TEL CO | 9329 | 1 |