HOLLIS — OK
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 3 |
| PIONEER TEL. COOP., INC. | 2018 | 1 |
| UNITED STATES CELLULAR - OK | 6272 | 1 |
Data last updated: March 10, 2026
| Carrier | OCN | NXX Count |
|---|---|---|
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 3 |
| PIONEER TEL. COOP., INC. | 2018 | 1 |
| UNITED STATES CELLULAR - OK | 6272 | 1 |