| Business | Phone |
| El Paso Production Co Inc 796 Fm 496, Zapata 78076 | (956) 765-9550 |
| Houston Exploration Co Fm 3074, Zapata 78076 | (956) 765-9702 |
| Laredo Energy 3024 N Highway 83, Zapata 78076 | (956) 765-5719 |
| Synthetic Energy Corp 5216 Vicki Ln, Zapata 78076 | (956) 765-3848 |