Seoul Broadcasting System (SBS) (Hangul: 에스비에스, Eseubieseu) KRX: 034120 is a national South Korean television and radio network. It is the only private commercial broadcaster with wide regional network affiliates to operate in the country. In March 2000, the company legally became known as SBS, changing its corporate name from Seoul Broadcasting System (서울방송그룹). It has been providing terrestrial digital TV service in the ATSC format since 2001, and T-DMB (Digital Multimedia Broadcasting) service since 2005. Its flagship terrestrial television station is Channel 6 for Digital and Cable.