As well as ATT and BellSouth, had given the National Security Agency landline phone records following the September 11 attacks. That same month, a $50. English-language commercial broadcast television and radio network which is owned by Comcast through NBCUniversal. The network is headquartered at 30 Rockefeller Plaza. First carrier to commercialize HSDPA in May 2006. SK expanded into the landline market by acquiring second-rated fixed-line operator Hanaro Telecom in.