Networking - HTTP status codes

Status	Description	RFC(s)
000	Used mostly with UDP traffic.	N/A
	Informational
100	Continue	2616
101	Switching Protocols	2616
102	Processing	2518
	Successful Transaction
200	OK	1945, 2616
201	Created	1945, 2616
202	Accepted	1945, 2616
203	Non-Authoritative Information	2616
204	No Content	1945, 2616, 4918
205	Reset Content	2616
206	Partial Content	2616
207	Multi Status	2518, 4918
	Redirection
300	Multiple Choices	1945, 2616, 4918
301	Moved Permanently	1945, 2616, 4918
302	Moved Temporarily	1945, 2616, 4918
303	See Other	2616, 4918
304	Not Modified	1945, 2616
305	Use Proxy	2616, 4918
307	Temporary Redirect	2616, 4918
	Client Error
400	Bad Request	1945, 2616, 4918
401	Unauthorized	1945, 2616
402	Payment Required	2616
403	Forbidden	1945, 2616, 4918
404	Not Found	1945, 2616
405	Method Not Allowed	2616
406	Not Acceptable	2616
407	Proxy Authentication Required	2616
408	Request Timeout	2616
409	Conflict	2616, 4918
410	Gone	2616
411	Length Required	2616
412	Precondition Failed	2616, 4918
413	Request Entity Too Large	2616
414	Request URI Too Large	2616, 4918
415	Unsupported Media Type	2616
416	Request Range Not Satisfiable	2616
417	Expectation Failed	2616
422	Unprocessable Entity	2518, 4918
424	Locked	(broken WebDAV implementations??)
424	Failed Dependency	2518, 4918
433	Unprocessable Entity
	Server Errors
500	Internal Server Error	1945, 2616
501	Not Implemented	1945, 2616
502	Bad Gateway	1945, 2616
503	Service Unavailable	1945, 2616
504	Gateway Timeout	2616
505	HTTP Version Not Supported	2616
507	Insufficient Storage	2518, 4918
	Broken Server Software
600	Squid: header parsing error
601	Squid: header size overflow detected while parsing
601	roundcube: software configuration error
603	roundcube: invalid authorization

References

RFC 1945 (HTTP/1.0)

RFC 2616 (HTTP/1.1)

RFC 2518

RFC 4918 (WebDAV)