NCT is a South Korean boy band formed by S.M. Entertainment.

NCT stands for Neo Cultural Technology, there's no limit to how many members and it's open for new recruits. They're not just one team, there are different units, first within Seoul will form all over the world for each major city. They're an infinitely open and growing worldwide group. 

The group debuted with their first sub-unit NCT U which is composed of six members: Taeil, Taeyong, Doyoung, Ten, Jaehyun and Mark. Besides, Kun and WinWin has formally debuted by participating in Chinese promotions of the group.

 NCT 127 based in Seoul, with the number 127 representing the longitude coordinates of Seoul. The unit will consist of seven members of Japanese, Chinese, and Korean descent. The unit consits of seven-member: Taeil, Taeyong, Yuta, Jaehyun, WinWin, Mark and Haechan. 

NCT DREAM, is known to be a 7-member all-teenage boy group. The members Jisung, Chenle, Jeno, Haechan, Mark, Renjun and Jaemin range between the ages of 14 and 17 years old.