MAYWOOD — IL
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| ILLINOIS BELL TEL CO | 9329 | 18 |
| SPOK, INC. | 6630 | 6 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | 4 |
| LEVEL 3 COMMUNICATIONS, LLC - IL | 6115 | 3 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 3 |