HOUSTON — TX
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| SOUTHWESTERN BELL | 9533 | 518 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 232 |
| AERIAL COMMUNICATIONS, INC. | 6701 | 167 |
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | 141 |
| SPOK, INC. | 6630 | 78 |