| Business | Phone |
| Pro-Quip Corp 2500 Wilcrest Dr, Houston 77042 | (713) 954-4877 |
| Choice Energy 10000 Memorial Dr, Houston 77024 | (713) 613-0540 |
| Entergy Solutions 3200 Mecom Rd, Houston 77032 | (281) 821-8445 |
| Northstar Gas Co Inc 14504 Briar Forest Dr 1114, Houston 77077 | (281) 493-5532 |
| High Island Oil Corp 1021 Main St 1440, Houston 77002 | (713) 650-3305 |
| Industrial Gas Supply Corp 1111 Louisiana St, Houston 77002 | (713) 207-5475 |
| Northern Natural Gas Co 333 Clay St, Houston 77002 | (713) 653-1800 |
| Quick Trade Llcp 1000 Louisiana St, Houston 77002 | (713) 844-7680 |
| Rosetta Resources Inc 717 Texas St 2800, Houston 77002 | (713) 335-4000 |
| Superior Natural Gas 1100 Louisiana St 350, Houston 77002 | (713) 759-6900 |
| British Gas 6411 Pickens St, Houston 77007 | (713) 426-2786 |
| One Nation Energy Solutions 401 Studewood St 304, Houston 77007 | (713) 861-0600 |
| Texas Gas Equipment Co 4600 Allen St, Houston 77007 | (713) 861-3821 |
| Envantage Inc 1415 North Loop W 1180, Houston 77008 | (832) 618-1555 |
| Shell Trading Gas & Power Co 1301 Mckinney St, Houston 77010 | (713) 230-3000 |
| Panther Energy Svc Inc 14405 Walters Rd 960, Houston 77014 | (832) 552-3600 |
| Center Point Energy 4220 Laura Koppe Rd A, Houston 77016 | (713) 659-2111 |
| Alternative Fuel Svc 5976 Armour Dr, Houston 77020 | (713) 672-0529 |
| Northstar Gas Co Inc 820 Gessner Rd, Houston 77024 | (713) 935-9542 |
| Perry Gas Co Inc 9225 Katy Fwy, Houston 77024 | (713) 467-0505 |
| Suez Energy 1990 Post Oak Blvd 1900, Houston 77056 | (713) 636-0000 |
| Valerus Compression Svc Lp 11335 Clay Rd 190, Houston 77041 | (713) 744-6100 |
| Perryman Propane Inc 12634 Beaumont Hwy, Houston 77049 | (281) 458-3110 |
| Texas Eastern Transmission Lp 5400 Westheimer Ct, Houston 77056 | (713) 627-5400 |
| Frontera Gas Supply 3388 Sage Rd, Houston 77056 | (713) 621-9020 |
| Pinnacle Natural Gas Co 2500 Citywest Blvd 740, Houston 77042 | (713) 965-9324 |
| Western Gas Liquids 1 Riverway, Houston 77056 | (713) 840-6376 |
| Tpc Corp 2603 Augusta Dr 1400, Houston 77057 | (281) 597-6200 |
| Tri Inc 5701 Woodway Dr 110, Houston 77057 | (713) 961-9622 |
| Vision Support Syst Inc Gas Co 800 Bering Dr, Houston 77057 | (713) 789-5496 |
| Quantum Energy Resource Inc 2500 Tanglewilde St, Houston 77063 | (281) 999-4800 |
| Syntroleum Corp 16800 Greenspoint Park Dr, Houston 77060 | (281) 873-5900 |
| Kawasaki Gas Turbines 8829 N Sam Houston Pkwy W, Houston 77064 | (281) 970-3255 |
| One Oak 450 Gears Rd 850, Houston 77067 | (281) 774-1600 |
| Propax Corp 7723 Wycomb Ln, Houston 77070 | (281) 955-9244 |
| Western Gas Co Houston 77070 | (281) 894-1444 |
| Reliant Energy Entex 20806 E Hardy Rd, Houston 77073 | (281) 209-0955 |
| Starbucks 200 N Dairy Ashford St, Houston 77079 | (281) 544-2121 |
| Gas Compression Svc 16365 Park Ten Pl, Houston 77084 | (281) 579-2718 |
| Togco Natural Gas Staorage Houston 77098 | (713) 526-2363 |
| Center Point Energy Entex Inc 1111 Louisiana St, Houston 77002 | (713) 654-5100 |
| Enbriddge Energy Inc 1100 Louisiana St 3300, Houston 77002 | (713) 650-8900 |
| Texican Natural Gas Co 500 Dallas St 1150, Houston 77002 | (713) 650-6579 |
| Prodigy Gas Advisory Svc 5300 Memorial Dr 975, Houston 77007 | (713) 861-9190 |
| Shell Trading Gas & Power Co 909 Fannin St 1, Houston 77010 | (713) 767-5400 |
| Texas Ohio Gas 10497 Town And Country Way, Houston 77024 | (713) 463-3258 |
| Santana Resources Ltd 2742 W Lane Dr, Houston 77027 | (713) 412-8107 |
| Quest Resources 6200 Savoy Dr 528, Houston 77036 | (713) 972-1307 |
| Southern Union Co 5444 Westheimer Rd, Houston 77056 | (713) 989-2000 |
| Williams Gas Pipeline Transco 2800 Post Oak Blvd, Houston 77056 | (713) 626-3061 |
| Choice Energy 5718 Westheimer Rd 1300, Houston 77057 | (713) 613-0537 |
| Zakhem Engineering Intl Inc 5615 Richmond Ave 200, Houston 77057 | (713) 266-0391 |
| Physichem Technologies Inc 2222 Bay Area Blvd 200, Houston 77058 | (281) 282-0852 |
| Energy Resource Technology Inc 400 N Sam Houston Pkwy E 400, Houston 77060 | (281) 618-0590 |
| Noble Energy Marketing Inc 100 Glenborough Dr, Houston 77067 | (281) 876-8800 |
| Oz Gas Corp 14721 Pebble Bend Dr A, Houston 77068 | (281) 444-5091 |
| P Jon Wilems Consultant 14811 Saint Marys Ln 175, Houston 77079 | (281) 558-0735 |
| Tejas Power 200 Westlake Park Blvd, Houston 77079 | (281) 597-4500 |