404 (disambiguation)

404 can mean:

• 404 (number), the number
• 404 AD, the year
• 404 BC
• 404 Error Not Found (film), a 2011 Hindi film
• HTTP 404, the HTTP error response status for "Not Found"
• Wikipedia:Linkrot, how to handle dead links (HTTP 404) in Wikipedia entries
• Project 404, a United States military mission to Laos during the Vietnam War
• Alitalia Flight 404, an Alitalia-Linee Aeree Italiane flight that crashed on 14 November 1990 killing all on board
• Telephone area code 404 in Atlanta
• Section 404 of Sarbanes-Oxley Act
• Cars:
  • The Peugeot 404
  • The Bristol 404, produced in the 1950s
• Highways:
  • The A404(M) motorway, in England
  • Ontario Highway 404, in Canada
  • Maryland Route 404, in the U.S.
• Movies:
  • Room 404 - The Wrong Man, the second room in Four Rooms