MARSHALLTN — IA
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| QWEST CORPORATION | 9631 | 5 |
| METROPCS, INC. | 5562 | 2 |
| UNITED STATES CELLULAR - IA | 6266 | 2 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | 2 |
| ONVOY, LLC - IA | 221F | 1 |