HIGHLANDS — 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 |
| ONVOY, LLC - TX | 903C | 2 |
| SHELCOMM | 0051 | 1 |
| LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | 1 |
| MCIMETRO ACCESS TRANSMISSION SERVICES LLC - TX | 7239 | 1 |