posted in early 2017
reformed in 2018
nct u — without u era
nct 127 — firetruck era
nct dream — my first and last era
nct dream — chewing gum era
nct 127 — limitless era
nct u — baby don't stop era
nct 127 — chain era
nct u — the 7th sense era
nct dream — go era
nct 127 — cherry bomb era
nct u — boss era
nct dream — we young era