Sprint Corporation, commonly referred to as Sprint, is an American telecommunications holding company that provides wireless services and is also a major global Internet carrier. It is the third-largest[5] wireless network operator in the United States, and serves 57.1 million customers as of 2015.[6] In addition to the Sprint brand, the company offers wireless voice, messaging, and broadband services through its various subsidiaries under the Boost Mobile, Virgin Mobile, and Assurance Wireless brands, as well as wholesale access to its wireless networks to mobile virtual network operators. The company is headquartered in Overland Park, Kansas. In July 2013, a majority of the company was purchased by Japanese telecommunications company SoftBank Corporation,[7] although the remaining shares of the company continue to trade on the New York Stock Exchange.