"Switch (feat. SR15B)" Released: December 20, 2016
NCT #127 is the first extended play by NCT 127, the multi-national and Seoul-based sub unit of the unlimited boy bandNCT. Following its announcement on July 1, SM Entertainment released it on July 10, 2016, with physical release on July 11, 2016. A heavily hip-hop and EDM influenced release, NCT #127 had the participation of the production team LDN Noise, Tay Jasper, Ylva Dimberg, Chris Wahle, Andreas Öberg, Timothy 'Bos' Bullock, Adrian McKinnon, MZMC, The Colleagues, Double Dragon, and others for both lyrics and production, while SM's founder, Lee Soo-man, was the EP's executive producer. With this release, NCT 127 became the first sub-unit to receive a major release. It was also the first and, currently,[when?] the only release of the group as a septet.
Onn its release, the EP was a commercial success for the unit, topping the Gaon Album Chart in the third week while being their first entry on the Billboard World Albums Chart, peaking at number two. Two singles were released to promote the EP, including the lead single "Fire Truck" and "Switch", with the former achieving minor success on the Gaon Digital Chart, barely missing out the top 100 in its first charting week.