FIATT — IL
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| AT&T ENTERPRISES, LLC | 516C | 1 |
| TON80 COMMUNICATIONS, LLC | 516J | 1 |
| ILLINOIS BELL TEL CO | 9329 | 1 |
Data last updated: March 10, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| AT&T ENTERPRISES, LLC | 516C | 1 |
| TON80 COMMUNICATIONS, LLC | 516J | 1 |
| ILLINOIS BELL TEL CO | 9329 | 1 |