SHAMROCK — TX
Data last updated: March 10, 2026
Area Codes
Top Carriers
| Carrier | OCN | NXX Count |
|---|---|---|
| CELLCO PARTNERSHIP DBA VERIZON WIRELESS - TX | 6506 | 1 |
| NEW CINGULAR WIRELESS PCS, LLC - IL | 6534 | 1 |
| TELEPORT COMMUNICATIONS AMERICA, LLC - TX | 7148 | 1 |
| SOUTHWESTERN BELL | 9533 | 1 |