| Business | Phone |
| Seismic Assistants Ltd 11011 Richmond Ave 333, Houston 77042 | (832) 242-0097 |
| Aim Geophysical Group Ltd 8556 Katy Fwy, Houston 77024 | (713) 464-6263 |
| Century Seismic 11221 Richmond Ave, Houston 77082 | (281) 596-9800 |
| Fortesa Resources Corp 2470 Gray Falls Dr 190, Houston 77077 | (281) 556-5656 |
| Frontier Petroleum Svc Inc 11211 Katy Fwy, Houston 77079 | (713) 467-3887 |
| Millenium Seismic 7751 San Felipe St, Houston 77063 | (713) 789-9181 |
| Geokinetics Inc 1 Riverway 2100, Houston 77056 | (713) 850-7600 |
| Geophysical Pursuit Inc 3501 Allen Pkwy, Houston 77019 | (713) 529-3000 |
| Geotrak Corp 4208 Richmond Ave, Houston 77027 | (713) 877-8055 |
| Grant Geophysical Inc 14521 Old Katy Rd 100, Houston 77079 | (281) 398-9503 |
| Landmark Graphics Corp 580 Westlake Park Blvd, Houston 77079 | (281) 560-7369 |