ROCK HILL — SC
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| COMPORIUM, INC. | 0542 | 15 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC | 6398 | 12 |
| NEW CINGULAR WIRELESS PCS, LLC - GA | 6214 | 9 |
| SUNCOM DBA T-MOBILE USA | 8645 | 7 |
| TON80 COMMUNICATIONS, LLC | 516J | 1 |