These codes are categorized into five classes: informational, success, redirection, client error, and server error responses. Each status code within these classes offers specific details about the state of the request and the server’s response.
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1xx Informational Responses
Status Code
Description
100 Continue
The server has received the request headers and the client should proceed to send the request body.
101 Switching Protocols
The server is switching protocols as requested by the client.
102 Processing (WebDAV)
The server has received and is processing the request, but no response is available yet.
103 Early Hints
The server is likely to send a final response with the headers included in the informational response.
2xx Success Responses
Status Code
Description
200 OK
The request has succeeded.
201 Created
The request has been fulfilled and a new resource has been created.
202 Accepted
The request has been accepted for processing, but the processing is not yet complete.
203 Non-Authoritative Information
The request was successful but the information may come from a different source.
204 No Content
The server successfully processed the request, but is not returning any content.
205 Reset Content
The server successfully processed the request, but is not returning any content and requires the requester to reset the document view.
206 Partial Content
The server is delivering only part of the resource due to a range header sent by the client.
3xx Redirection Responses
Status Code
Description
300 Multiple Choices
There are multiple options for the resource the client may follow.
301 Moved Permanently
The resource has been permanently moved to a new URL.
302 Found
The resource is temporarily located at a different URL.
303 See Other
The response can be found under a different URI and should be retrieved using a GET method.
304 Not Modified
The resource has not been modified since the last request.
307 Temporary Redirect
The request should be repeated with another URL, but future requests should still use the original URL.
308 Permanent Redirect
The request and all future requests should be repeated using another URL.
4xx Client Error Responses
Status Code
Description
400 Bad Request
The server could not understand the request due to invalid syntax.
401 Unauthorized
The client must authenticate itself to get the requested response.
402 Payment Required
Reserved for future use; currently unused.
403 Forbidden
The client does not have access rights to the content.
404 Not Found
The server can not find the requested resource.
405 Method Not Allowed
The request method is known by the server but has been disabled and cannot be used.
406 Not Acceptable
The server cannot produce a response matching the list of acceptable values defined in the request’s headers.
407 Proxy Authentication Required
The client must authenticate with a proxy.
408 Request Timeout
The server did not receive a complete request in time.
409 Conflict
The request conflicts with the current state of the server.
410 Gone
The requested resource is no longer available and will not be available again.
411 Length Required
The server rejects the request because the Content-Length header field is not defined and the server requires it.
412 Precondition Failed
The client has indicated preconditions in its headers which the server does not meet.
413 Payload Too Large
The request entity is larger than limits defined by the server.
414 URI Too Long
The URI requested by the client is longer than the server is willing to interpret.
415 Unsupported Media Type
The media format of the requested data is not supported by the server.
416 Range Not Satisfiable
The range specified by the Range header field in the request cannot be fulfilled.
417 Expectation Failed
The server cannot meet the requirements of the Expect header field.
5xx Server Error Responses
Status Code
Description
500 Internal Server Error
The server has encountered a situation it doesn’t know how to handle.
501 Not Implemented
The request method is not supported by the server and cannot be handled.
502 Bad Gateway
The server, while working as a gateway to get a response needed to handle the request, got an invalid response.
503 Service Unavailable
The server is not ready to handle the request.
504 Gateway Timeout
The server, while acting as a gateway to get a response needed to handle the request, did not get a response in time.
505 HTTP Version Not Supported
The HTTP version used in the request is not supported by the server.
506 Variant Also Negotiates
The server has an internal configuration error.
507 Insufficient Storage (WebDAV)
The server is unable to store the representation needed to complete the request.
508 Loop Detected (WebDAV)
The server detected an infinite loop while processing the request.
510 Not Extended
Further extensions to the request are required for the server to fulfill it.
511 Network Authentication Required
The client needs to authenticate to gain network access.
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