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Groups
Agencies
Solo artist
MARK
마크
Formerly in
NCT
,
NCT 127
,
NCT DREAM
,
NCT U
,
SuperM
Agency
SM Entertainment
Debut
2016
YouTube subscribers
383,000
(as of Nov. 2, 2026)
Official channels
YouTube
@UpperRoomLabel
Instagram
@onyourm__ark