CenterPoint Energy makes a point of selling energy through power and gas distribution utilities, and natural gas pipeline, gathering, and marketing operations. CenterPoint Energy's regulated utilities distribute natural gas to 3.4 million customers in six US states and electricity to more than 2.3 million customers on the Texas Gulf Coast. The company's main stomping ground is Texas, where it has regulated power distribution operations through subsidiary CenterPoint Energy Houston Electric. CenterPoint Energy operates more than 51,594 miles of power distribution lines, 20,000 miles of interstate gas pipeline, and 3,700 miles of gas gathering pipeline. It also provides natural gas field services.