| Business | Phone |
| Centerpoint Energy Gas Trans 3412 S Airport Rd, Marshall 75672 | (903) 935-7108 |
| Link Energy Corp Harkins Ln, Marshall 75670 | (903) 938-8256 |
| Mid-Valley Pipeline Co 11398 Highway 43 N, Marshall 75672 | (903) 938-7421 |
| Natural Gas Pipeline Co 583 Terrapin Neck Rd, Marshall 75672 | (903) 935-7711 |
| Natural Gas Pipeline Marshall State Highway 43 S, Marshall 75670 | (903) 938-5297 |
| Texas Gas Gathering Co 200 S Grove St, Marshall 75670 | (903) 935-2333 |