WINTERSET — IA
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| UNITED STATES CELLULAR - IA | 6266 | 9 |
| OMNITEL COMMUNICATIONS, INC. - IA | 3620 | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 1 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | 1 |
| MCC TELEPHONY OF IOWA, LLC - IA | 751F | 1 |