NCT U consists of 6 members:
- Taeil (real name: Moon Tae Il, age 23) - Main Vocalist
- Taeyong (real name: Lee Tae Yong, age 22) - Main Rapper, Lead Dancer, Vocalist, Visual
- Doyoung (real name: Kim Dong Young, age 21) - Main Vocalist
- Ten (real name: Chittaphon Leechaiyapornku, age 21) - Main Dancer, Rapper, Vocalist
- Jaehyun (real name: Jung Yoon Oh, age 20) - Lead Vocalist
- Mark (real name: Mark Lee, age 18) - Lead Rapper, Vocalist, Maknae
- Taeil (real name: Moon Tae Il, age 23) - Main Vocalist
- Taeyong (real name: Lee Tae Yong, age 22) - Main Rapper, Lead Dancer, Vocalist, Visual, Face of the Group
- Doyoung (real name: Kim Dong Young, age 21) - Main Vocalist
- Jaehyun (real name: Jung Yoon Oh, age 20) - Lead Vocalist, Rapper
- Mark (real name: Mark Lee, age 18) - Main Rapper, Vocalist
- Johnny (real name: Seo Young Ho, age 22) - Main Dancer, Vocalist
- Yuta (real name: Nakamoto Yuta, age 22) - Lead Dancer, Rapper, Vocalist
- WinWin (real name: Dong Si Cheng, age 20) - Lead Dancer, Vocalist, Visual
- Haechan (real name: Lee Dong Hyuk, age 17) - Lead Vocalist, Lead Dancer, Maknae
- Mark (real name: Mark Lee, age 18) - Leader, Main Rapper, Vocalist, Face of the Group
- Renjun (real name: Huang Ren Jun, age 17) - Vocalist
- Jeno (real name: Lee Je No, age 17) - Lead Dancer, Vocalist, Visual
- Haechan (real name: Lee Dong Hyuk, age 17) - Lead Vocalist, Lead Dancer
- Jaemin (real name: Na Jae Min, age 17) - Lead Dancer, Vocalist
- Chen Le (real name: Zhong Chen Le, age 16) - Main Vocalist
- Jisung (real name: Park Ji Sung, age 15) - Main Dancer, Vocalist, Maknae
- The first unit of NCT, NCT U, was introduced on April 4, 2016 with six members.
- On July 1, 2016 S.M. Entertainment announced NCT's second unit, NCT 127. NCT 127 is based in Seoul, with the number 127 representing the longitudinal coordinates of Seoul.
- On August 18, 2016, the company announced that NCT's third unit would be called NCT Dream.
- NCT 127 received "Best Newcomer" awards from the Mnet Asian Music Awards, the Golden Disk Awards and the 2016 Seoul Music Awards.
- On February 14, 2017, NCT Dream won 1st place on the 100th episode of SBS MTV's The Show. This marks the first ever music show win for a NCT unit.
- NCT Dream was chosen as the official ambassador for the 2017 FIFA U-20 World Cup Korea.