- Central Texas – 78600-78799, 78900-78999, except 78676 & 786666
- Dallas – 75000-75399, 75800-75899
- El Paso – 79800-79999
- Fort Worth – 76000-76499
- Houston – 77000-77599 except 77340 & 77320
- San Antonio AGD - 78000-78299, 78800-78899, 77900-77999
- Brazos Valley - 77800-77899, 77320, 77340
- Heart of Texas - 76500-76799
- Rio Grande - 78500-78599
- East Texas AGD- 75400-75799, 75900-75999
- Panhandle- 79000-79299