ROBSTOWN — TX
Data last updated: June 25, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| FRONTIER SOUTHWEST INC DBA FRONTIER COMM OF TEXAS | 4344 | 2 |
| METROPCS, INC. | 5562 | 2 |
| LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | 2 |
| STPCS JOINT VENTURE, LLC | 4290 | 1 |
| TWC IP ENABLED SERVICES, LLC | 793K | 1 |