456 may refer to:
The year 456 AD The year 456 BC The year 456 AH in the Islamic calendar British Rail Class 456, an electric multiple unit passenger train Ferrari 456, a grand tourer 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
See also 456th (disambiguation)