| Business | Phone |
| Geodata Corp 10615 Shadow Wood Dr 106, Houston 77043 | (713) 465-9911 |
| Shot Point Svc 2202 Waugh Dr, Houston 77006 | (713) 461-8166 |
| Seisco 8556 Katy Fwy, Houston 77024 | (281) 579-3676 |
| Seismic Exchange Inc 11050 Capital Park Way, Houston 77041 | (713) 623-8300 |
| First Exchange Corp 7880 San Felipe St 105, Houston 77063 | (281) 597-8888 |
| Seiscan Geodata 2500 Tanglewilde St 277, Houston 77063 | (713) 782-5420 |
| Pgsa/S 16010 Barkers Point Ln 600, Houston 77079 | (281) 509-8500 |
| Pgs Exploration Us Inc 15150 Memorial Dr, Houston 77079 | (281) 509-8000 |
| Pgs Exploration Us Inc 738 Highway 6 S 300, Houston 77079 | (281) 589-0085 |
| Willisco 15995 N Barkers Landing Rd, Houston 77079 | (281) 496-3460 |
| Gdi 10633 Shadow Wood Dr, Houston 77043 | (713) 973-1404 |
| Seitel Inc 10811 S Westview Circle Dr, Houston 77043 | (832) 295-8300 |
| Sytech Corp 7910 Westglen Dr 105, Houston 77063 | (713) 783-9540 |
| Veritas Dgc Inc 10300 Town Park Dr, Houston 77072 | (832) 351-8300 |
| Pac Geophysical 1035 Dairy Ashford St 218, Houston 77079 | (281) 293-0293 |
| Petroleum Geo-Services Inc 738 Highway 6 S, Houston 77079 | (281) 589-8818 |
| Pgs Nopec As 738 Highway 6 S, Houston 77079 | (281) 589-1294 |
| Texas Geophysical Supply 1644 Elmview Dr, Houston 77080 | (713) 973-7476 |
| Seis Pros Intl Inc 3311 Richmond Ave 228, Houston 77098 | (713) 529-3140 |