Status Code Meaning
1xx CODES – INFORMATION ONLY
100 – Continue; part of request received
101 – OK to switch protocols
2xx CODES – SUCCESS
200 – OK; all requested info returned
201 – Created; request filled
202 – Accepted; request received
203 – Source unknown; info came from 3rd party
204 – No new content; nothing to send back
205 – Reset content; OK to clear form
206 – Request only partially filled
3xx CODES – REDIRECTION
300 – Header for 3xx codes
301 – Moved permanently; use new URL
302 – Moved temporarily; use same URL
303 – Redirected
304 – Not modified since; use cached copy
305 – Use proxy; URL is provided
4xx CODES – FAILURE
400 – Did not understand request; try again
401 – Authorization required; needs password
402 – Payment required; needs payment data
403 – Request refused; may not give reason
404 – Not found; not sure of reason (typo, etc.)
406 – Content type not acceptable to request
407 – Browser must authenticate itself
408 – Timed out; send request again
409 – Update conflict; explanation provided
410 – Not found; resource permanently gone
411 – Content length missing in request
412 – Conditions on request failed
413 – Request too long to process
414 – Resource address too long to process
415 – Unsupported media type; bad format
5xx CODES – SERVER ERRORS
500 – Internal server error
501 – Server cannot fill request
502 – Server cannot process gateway request
503 – Server overloaded or service over limits
504 – Gateway or proxy server timed out
505 – HTTP version not supported in server
