SUMTER — SC
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER COMMUNICATIONS OF THE CAROLINAS INC. - SC | 4335 | 7 |
| BANDWIDTH.COM CLEC, LLC - SC | 077F | 3 |
| FTC DIVERSIFIED SERVICES, INC. | 4255 | 3 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - SC | 6398 | 3 |
| LEVEL 3 COMMUNICATIONS, LLC - SC | 5258 | 2 |