03

48may refer to:


 * The year 2003, or any year ending with 03
 * The month of March
 * 3 (number)

Music

 * 03 (Twelve album), 2007
 * 03 (Urban Zakapa album), 2013

Other uses

 * 03 numbers, a non-geographic telephone number range in the UK
 * The telephone area code for the South Island of New Zealand.
 * The number of the French department Allier
 * The occupational field designator for U.S. Marine Corps Infantry
 * Tokyo Metro 03 series