Founded in 1929, Texas Gas Service is one of the largest natural gas distribution companies in Texas. The company serves more than 600,000 residential, commercial and industrial customers. It maintains a work force of over 600 employees. Texas Gas Service provides online bill payment and account access services. The company is a division of ONEOK, which is one of the largest energy companies in the United States. Additionally, ONEOK is a Fortune 500 company and has nearly 2 million customers. The company has a partnership with ONEOK Partners, which is a publicly traded limited partnership and is engaged in the gathering, processing, storage and transportation of natural gas.