TOMBALL — TX
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| SOUTHWESTERN BELL | 9533 | 19 |
| ONVOY, LLC - TX | 903C | 5 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 4 |
| LEVEL 3 COMMUNICATIONS, LLC - TX | 6114 | 3 |
| ONVOY SPECTRUM, LLC | 624H | 3 |