SIOUX CITY — IA
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 13 |
| QWEST CORPORATION | 9631 | 13 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IA | 6570 | 8 |
| T-MOBILE USA, INC. | 6529 | 5 |
| LONG LINES METRO, INC. - IA | 828B | 3 |