ONE Gas consists of former ONEOK natural gas utilities: Kansas Gas Service, Oklahoma Natural Gas Company, and Texas Gas Service. One of the largest publicly traded natural gas utilities in the US, ONE Gas serves more than 2 million customers in three states. Kansas Gas Service has more than 13,500 miles of distribution mains and service lines and serves more than 635,000 customers; Oklahoma Natural Gas Company has more than 19,100 miles of distribution mains and service lines and serves about 861,000 customers; while Texas Gas Service has more than 10,900 miles of distribution mains and service lines and serves about 644,000 customers. ONEOK spun off ONE Gas in early 2014.