| Business | Phone |
| American Wind Energy 1101 14th St Nw, Washington 20005 | (202) 408-4870 |
| Cambridge Energy Research 1150 Connecticut Ave Nw # 201, Washington 20036 | (202) 463-7833 |
| Center For Renewable Energy 1200 18th St Nw # 900, Washington 20036 | (202) 530-2202 |
| Citizens-Real Energy Solutions 1775 I St Nw, Washington 20006 | (202) 721-8800 |
| Cms Energy Corp 1016 16th St Nw # 500, Washington 20036 | (202) 293-5794 |
| Co Energy Group 1 Dc Village Ln Sw, Washington 20032 | (202) 373-0300 |
| Dte Energy 601 Pennsylvania Ave Nw # 350n, Washington 20004 | (202) 347-8420 |
| Energy Markets Group 1411 K St Nw, Washington 20005 | (202) 347-0264 |
| Energy Services Team 1834 13th St Nw, Washington 20009 | (202) 234-7745 |
| Enron Energy Svc 1825 I St Nw, Washington 20006 | (202) 429-2044 |
| Equinox Energy Solution Inc 1785 Massachusetts Ave Nw, Washington 20036 | (202) 772-0099 |
| Industrial Energy Consumers 1 Thomas Cir Nw, Washington 20005 | (202) 223-1661 |
| Mco Energy Markets 1825 I St Nw, Washington 20006 | (202) 429-2720 |
| National Renewable Energy Lab 901 D St Sw # 930, Washington 20024 | (202) 646-5050 |
| Potomac Energy Svc 1825 K St Nw, Washington 20006 | (202) 454-1000 |
| Strategic Energy 1350 I St Nw, Washington 20005 | (202) 289-5012 |
| Tharaldson Energy Group Inc 2300 Wisconsin Ave Nw, Washington 20007 | (202) 333-5125 |
| Washington Energy Conservation 730 12th St Nw, Washington 20005 | (202) 347-4386 |