DUPREE — SD
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| CHEYENNE RIVER SIOUX TRIBAL TEL. AUTHORITY | 1647 | 2 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 2 |
Data last updated: March 10, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| CHEYENNE RIVER SIOUX TRIBAL TEL. AUTHORITY | 1647 | 2 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 2 |