63 may refer to:
* 63 (number)
* one of the years 63 BC, AD 63, 1963, 2063
* +63, telephone country code in the Philippines
* Flight 63 (disambiguation)
* 63 (album), ''63'' (album), by Tree63
* 63 (mixtape), ''63'' (mixtape), by Kool A.D.
* "Sixty Three", a song by Karma to Burn from the album ''Mountain Czar'', 2016
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