Xcel Energy offers a range of products and services for more than 5 million residential and commercial customers. As a combination electricity and natural gas energy company, it has operations in Colorado, Michigan, Minnesota, New Mexico, North Dakota, South Dakota, Texas and Wisconsin. The company maintains a work force of over 11,000 employees. Xcel Energy has a nearly 35,000 miles of pipeline. It additionally offers online bill payment services. The company operates several subsidiaries, including Eloigne Company, Northern States Power Company Minnesota, Southwestern Public Service Company and Quixx Corporation. Xcel Energy is operational for approximately 130 years, as well as offers online order placement solutions.