BELLEVILLE — IL
Data last updated: October 30, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| ILLINOIS BELL TEL CO | 9329 | 16 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | 12 |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | 5 |
| T-MOBILE USA, INC. | 6529 | 4 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IL | 7196 | 2 |