| Business | Phone |
| Aurora Power Resources 10333 Richmond Ave 710, Houston 77042 | (713) 977-5799 |
| Gas Price Report 1715 Briarpark Dr, Houston 77042 | (713) 781-7690 |
| Hng Storage Co 2929 Briarpark Dr 140, Houston 77042 | (713) 781-4949 |
| Kimball Resources Inc 10370 Richmond Ave 500, Houston 77042 | (713) 783-7723 |
| Kimball Trading Co Llc 10370 Richmond Ave, Houston 77042 | (713) 914-0002 |
| Natural Gas Source Inc 10202 Shady River Dr, Houston 77042 | (713) 781-5755 |
| System Supply For End-Users 2825 Wilcrest Dr, Houston 77042 | (713) 781-3402 |
| Western Gas Resources Inc 2925 Briarpark Dr, Houston 77042 | (713) 954-5300 |
| Acadiana Natural Gas Co 720 N Post Oak Rd, Houston 77024 | (713) 682-8575 |
| Adobe Energy Inc 16800 Imperial Valley Dr, Houston 77060 | (281) 820-0988 |
| Advanced Extraction Technology 2 Northpoint Dr A20, Houston 77060 | (281) 447-0571 |
| Ameri Gas 13105 Northwest Fwy 500, Houston 77040 | (281) 556-5131 |
| Penn Mutual Life Insurance Co 1015 Bade St, Houston 77055 | (713) 464-5151 |
| Cargill Energy 908 Town And Country Blvd, Houston 77024 | (713) 984-7580 |
| Cedar Gas Co 1770 Saint James Pl, Houston 77056 | (713) 965-9162 |
| Cheniere Lng Inc 717 Texas St # 3100, Houston 77002 | (713) 659-1361 |
| Choice Energy 5718 Westheimer Rd # 1300, Houston 77057 | (713) 613-0500 |
| Cokinos Energy Corp 5718 Westheimer Rd 900, Houston 77057 | (713) 974-0101 |
| Colonial Energy Inc 3 Riverway 2000, Houston 77056 | (713) 654-0606 |
| Constellation Energy 500 Dallas St # 3010, Houston 77002 | (713) 652-1260 |
| Constellation Energy Source 1100 Louisiana St, Houston 77002 | (713) 652-1280 |
| Eagle Energy Development 3355 W Alabama St, Houston 77098 | (713) 961-5517 |
| Eagle Rock 14950 Heathrow Forrest Pkwy, Houston 77032 | (832) 327-8000 |
| Elm Ridge Resources Inc 16350 Park Ten Pl, Houston 77084 | (281) 828-0051 |
| Enersea Transport 3555 Timmons Ln 650, Houston 77027 | (713) 963-9333 |
| Enron Gas Pipeline Operating 1400 Smith St, Houston 77002 | (713) 654-7836 |
| Envantage Inc 1415 North Loop W # 1180, Houston 77008 | (713) 618-1555 |
| Excel Resources 2309 Fannin St, Houston 77002 | (713) 659-2309 |
| Gas Compression Svc Inc 1333 Eldridge Pkwy, Houston 77077 | (281) 558-8281 |
| Mhp 16420 Park Ten Pl, Houston 77084 | (281) 597-6777 |
| Global Productions 10683 Mayfield Rd, Houston 77043 | (713) 622-2222 |
| Mark West Pinnacle Lp 2500 Citywest Blvd, Houston 77042 | (713) 965-9151 |
| Gulf Coast Svc 13920 Almeda Rd 2, Houston 77053 | (713) 413-1051 |
| Legend Natural Gas 16420 Park Ten Pl 520, Houston 77084 | (281) 675-8300 |
| Houston Energy Svc 1200 Smith St, Houston 77002 | (713) 652-5004 |
| Houston Energy Svc Llc 10497 Town And Country Way, Houston 77024 | (713) 463-5040 |
| Intercon Gas Inc 1331 Lamar St 1365, Houston 77010 | (713) 659-3554 |
| Jm & Ral Energy Inc 1249 Blalock Rd # B, Houston 77055 | (281) 558-5301 |
| J M & Ral Energy Inc 950 Threadneedle St, Houston 77079 | (281) 558-5301 |
| Las Animas Pipeline 6219 Richmond Ave, Houston 77057 | (713) 972-1527 |
| Energy Analytics 1220 Augusta Dr 400, Houston 77057 | (832) 200-6913 |
| National Energy & Trade Llc 3700 Buffalo Speedway, Houston 77098 | (713) 871-1757 |