RED OAK — IA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | 2 |
| AIRUS, INC - IA | 423H | 1 |
| MCC TELEPHONY LLC | 593K | 1 |
| UNITED STATES CELLULAR - IA | 6266 | 1 |
| QWEST CORPORATION | 9631 | 1 |