504 (disambiguation)

504 may refer to: 504, a year Avro 504, a World War 1 era biplane aircraft built by Avro Peugeot 504, a large family car Area code 504, telephone code in Louisiana, United States Section 504 of the Rehabilitation Act, which protects Americans with disabilities from discrimination by any entity that receives Federal funding 504 Gateway Timeout, a server error in web browsing etc. – see List of HTTP status codes § Server errors 504 King, a streetcar route in Toronto, Canada No. 504 Squadron RAF, of Britain's Royal Air Force List of highways numbered 504

See also 504th (disambiguation)