HARVARD — IL
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| METROPCS, INC. | 5562 | 1 |
| T-MOBILE USA, INC. | 6529 | 1 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | 1 |
| CHARTER IP ENABLED SERVICES, LLC | 792K | 1 |
| ILLINOIS BELL TEL CO | 9329 | 1 |