| Business | Phone |
| Oyo Instruments 7007 Pinemont Dr, Houston 77040 | (713) 937-5800 |
| Pro Seismic Svc 5291 Langfield Rd, Houston 77040 | (713) 263-0272 |
| Dawson Geophysical Co 10200 Richmond Ave 120, Houston 77042 | (713) 917-6772 |
| Jebco 2450 Fondren Rd 112, Houston 77063 | (713) 975-0202 |
| Odegaard 10777 Westheimer Rd, Houston 77042 | (713) 783-1218 |
| Tgs Calibre Geophysical Co 2500 Citywest Blvd 2000, Houston 77042 | (713) 334-3004 |
| Tricon Geophysics Inc 10111 Richmond Ave 230, Houston 77042 | (713) 532-5006 |
| Echo Geophysical 15995 N Barkers Landing Rd, Houston 77079 | (713) 572-3246 |
| Ensoco Inc 2323 S Voss Rd 490, Houston 77057 | (713) 278-2326 |
| Gallant Energy 6125 W Sam Houston Pkwy N, Houston 77041 | (713) 849-8540 |
| Geonyx Seismic Svc 11111 Katy Fwy 460, Houston 77079 | (713) 465-2342 |
| Mercury International Tech Inc 2500 West Loop S, Houston 77027 | (713) 850-7354 |
| Lynx Information Systems Inc 16420 Park Ten Pl 150, Houston 77084 | (281) 599-7226 |
| Kelman Technologies 1880 S Dairy Ashford St, Houston 77077 | (281) 293-0537 |
| International Foundation 10688 Haddington Dr, Houston 77043 | (281) 579-7800 |
| Isys Group 8711 Maplecrest Dr, Houston 77099 | (281) 933-8138 |