404

404 may refer to:

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.
• For other highways numbered 404, see the List of highways numbered 404

Years

• 404 AD
• 404 BC

Other uses

• 404 (number), the number
• 404 Error Not Found (film), a 2011 Hindi film
• 404 (band), a band signed to Dirty Hit
• 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
• Martin 4-0-4, an American pressurized passenger airliner built by the Glenn L. Martin Company
• Telephone area code 404 in Atlanta
• Section 404 of Sarbanes-Oxley Act
• Room 404 - The Wrong Man, the second room in Four Rooms
• "404" song by Ram Jam from the album Ram Jam.