South Korean boy band NCT 127 have released five studio albums, three reissues, one live album, seven extended plays, and nineteen singles. The group debuted in 2016 with their eponymous extended play and its lead single "Fire Truck" as a sub-unit of NCT. It was followed by two extended plays, Limitless and Cherry Bomb, released in 2017. Each spawned one single: "Limitless" and "Cherry Bomb". The following year, the group recorded a single, "Touch", for NCT's first studio album as a complete group, titled NCT 2018 Empathy. In May 2018, they debuted their first Japanese-language extended play, Chain. Its lead single of the name was their first song to chart on the Billboard Japan Hot 100. In October 2018, they released their first studio album, Regular-Irregular, and its lead single of the