Name: NCT 127 Debut: July 7, 2016 Debut Single: "Fire Truck" Members:Taeil, Taeyong, Yuta, Jaehyun, WinWin, Mark and Haechan NCT 127 is the Seoul-based unit of the SM Entertainment idol group NCT. The number 127 represents the longitudinal coordinates for Seoul, and the unit consists of seven members: Taeil, Taeyong, Yuta, Jaehyun, WinWin, Mark and Haechan. NCT 127 was the second NCT unit to debut, doing so with a lead single entitled "Fire Truck" in July of 2016. The group followed their debut with the release of "Taste The Feeling," a promotional single with Coca-Cola for the Rio 2016 Olympics.