DEERFIELD — IL
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| ILLINOIS BELL TEL CO | 9329 | 14 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 6 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - IL | 7136 | 4 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC | 7229 | 4 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL | 6333 | 3 |