456 may refer to: The year 456 AD The year 456 BC The year 456 AH in the Islamic calendar The British Rail Class 456 electric multiple unit The Ferrari 456 road car Seong Gi-hun of Squid Game The 4, 5, 6 IRT Lexington Avenue Line The 456, a race of aliens in the BBC science fiction series Torchwood 456 (album), a 1992 album by The Grid 4,5,6, a 1995 album by Kool G Rap "4, 5, 6", a 1999 song by Solé Cee-lo, a dice game also known as Four-Five-Six