| Business | Phone |
| Texas Gas Investments Llc 901 S Mo Pac Expy, Austin 78746 | (512) 732-9900 |
| St Martin Bc 40 N Ih 35, Austin 78701 | (512) 477-7452 |
| Majestic Resources Inc 3625 Manchaca Rd 203, Austin 78704 | (512) 445-3400 |
| Excalibur E & P 1714 Fortview Rd 106, Austin 78704 | (512) 444-6673 |
| Cbn Operating Corp 1114 Lost Creek Blvd 215, Austin 78746 | (512) 328-2454 |
| Ayco Energy 5524 Bee Cave Rd, Austin 78746 | (512) 306-8500 |
| Alex Castano Committee 110 Wild Basin Rd S, Austin 78746 | (512) 327-7400 |
| Dms Exploration 111 Congress Ave 471, Austin 78701 | (512) 391-3803 |
| Mex Tex Operating Co 311 S Fm 620, Austin 78734 | (512) 402-1130 |
| Chaparral Natural Resources 11417 Fm 1625, Austin 78747 | (512) 693-2004 |
| Maxson 4807 Spicewood Springs Rd, Austin 78759 | (512) 342-9334 |
| Terax Energy Inc 9600 Great Hills Trl, Austin 78759 | (512) 231-8444 |