503 (disambiguation)

503 may refer to:

• 503, a year
• An HTTP status code indicating "Service Unavailable".
• A luxury car built by BMW, from 1955 to 1960.
• A type of jeans, commonly in Levi's and Edwin
• A type of steel used for making bicycle frames.
• Country code +503, for El Salvador
• Area code 503, a North American telephone area code in northwestern Oregon.
• 503, a track by Hans Zimmer on the Angels & Demons soundtrack.