PALOS PARK — IL
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| ILLINOIS BELL TEL CO | 9329 | 5 |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | 2 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 2 |
| STRATUS NETWORKS | 495J | 1 |
| AT&T ENTERPRISES, LLC | 516C | 1 |