LEMONT — IL
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| ILLINOIS BELL TEL CO | 9329 | 13 |
| T-MOBILE USA, INC. | 6529 | 5 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | 4 |
| PEERLESS NETWORK OF ILLINOIS, LLC - IL | 063E | 1 |
| ONVOY, LLC | 224C | 1 |