Sprint Nextel Corporation (NYSE:S) is a United States-based holding company that operates multiple wireline and wireless networks serving consumer, business and government customers in the United States, Puerto Rico, and the U.S. Virgin Islands primarily under the Sprint. Sprint Nextel, through its various subsidiaries, also offers services under the Boost Mobile, Virgin Mobile and Assurance Wireless brands. Sprint is a tier 1 global Internet access service provider. Sprint Nextel is the United States' third largest long distance provider by subscribers. Sprint Nextel derives additional revenue by offering wholesale access to its wireless networks. As of 2012, the Sprint wireless network serves more than 55.6 million customers.