Reliant, an NRG Company Utilities Reliant, an NRG Company Visit Website Request Info 1201 Fannin St., Ste. 3711 Houston, TX 77002 (713) 775-2958 8-325-842-2649 (fax) About Map About We take pride in each of the residences and businesses we power, while giving back to the community in which we live and work. The largest commercial & industrial retail electricity provider in Texas What's Nearby? Distance: 5 10 15 20 25 50 mi.