Not Found
What 404 means
The server cannot find the requested resource — the most familiar error on the web.
The URL may be mistyped, the page may have been deleted or moved without a redirect. It does not say whether the absence is temporary or permanent.
Client errors (4xx)
The request contains an error from the client — bad syntax, missing auth or a wrong URL.
Other 4xx codes
FAQ — 404
What does HTTP 404 mean?
404 Not Found: The server cannot find the requested resource — the most familiar error on the web. The URL may be mistyped, the page may have been deleted or moved without a redirect. It does not say whether the absence is temporary or permanent.
Which class does status code 404 belong to?
404 is a Client errors (4xx) code. The request contains an error from the client — bad syntax, missing auth or a wrong URL.
Where is the 404 code defined?
Status code 404 is defined in RFC 9110 and is part of the IANA HTTP Status Code Registry.