DUNCAN — OK
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| SOUTHWESTERN BELL | 9533 | 5 |
| T-MOBILE USA, INC. | 6529 | 3 |
| UNITED STATES CELLULAR - OK | 6272 | 2 |
| TELNYX LLC | 073H | 1 |
| TON80 COMMUNICATIONS, LLC | 516J | 1 |
Data last updated: June 25, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| SOUTHWESTERN BELL | 9533 | 5 |
| T-MOBILE USA, INC. | 6529 | 3 |
| UNITED STATES CELLULAR - OK | 6272 | 2 |
| TELNYX LLC | 073H | 1 |
| TON80 COMMUNICATIONS, LLC | 516J | 1 |