OSCEOLA — IA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| WINDSTREAM IOWA COMMUNICATIONS, INC. - NORTH | 1167 | 2 |
| UNITED STATES CELLULAR - IA | 6266 | 1 |
| T-MOBILE USA, INC. | 6529 | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 1 |
| IOWA RSA 2 LIMITED PARTNERSHIP DBA CHAT MOBILITY | 9572 | 1 |