PARK RIDGE — IL
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| ILLINOIS BELL TEL CO | 9329 | 11 |
| ONVOY, LLC | 224C | 2 |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | 2 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | 2 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | 2 |