| Enumerator | 
|---|
| c100_continue | The server has received the request headers, and the client should proceed to send the request body.  | 
| c101_switchingProtocols | The requester has asked the server to switch protocols.  | 
| c103_checkpoint | Used in the resumable requests proposal to resume aborted PUT or POST requests.  | 
| c200_ok | The request is OK (this is the standard response for successful HTTP requests)  | 
| c201_created | The request has been fulfilled, and a new resource is created.  | 
| c202_accepted | The request has been accepted for processing, but the processing has not been completed.  | 
| c203_nonAuthoritativeInformation | The request has been successfully processed, but is returning information that may be from another source.  | 
| c204_noContent | The request has been successfully processed, but is not returning any content.  | 
| c205_resetContent | The request has been successfully processed, but is not returning any content, and requires that the requester reset the document view.  | 
| c206_partialContent | The server is delivering only part of the resource due to a range header sent by the client.  | 
| c300_multipleChoices | A link list. The user can select a link and go to that location. Maximum five addresses.  | 
| c301_movedPermanently | The requested page has moved to a new URL.  | 
| c302_found | The requested page has moved temporarily to a new URL.  | 
| c303_seeOther | The requested page can be found under a different URL.  | 
| c304_notModified | Indicates the requested page has not been modified since last requested.  | 
| c306_switchProxy | No longer used.  | 
| c307_temporaryRedirect | The requested page has moved temporarily to a new URL.  | 
| c308_resumeIncomplete | Used in the resumable requests proposal to resume aborted PUT or POST requests.  | 
| c400_badRequest | The request cannot be fulfilled due to bad syntax.  | 
| c401_unauthorized | The request was a legal request, but the server is refusing to respond to it. For use when authentication is possible but has failed or not yet been provided.  | 
| c402_paymentRequired | Reserved for future use.  | 
| c403_forbidden | The request was a legal request, but the server is refusing to respond to it.  | 
| c404_notFound | The requested page could not be found but may be available again in the future.  | 
| c405_methodNotAllowed | A request was made of a page using a request method not supported by that page.  | 
| c406_notAcceptable | The server can only generate a response that is not accepted by the client.  | 
| c407_proxyAuthenticationRequired | The client must first authenticate itself with the proxy.  | 
| c408_requestTimeout | The server timed out waiting for the request.  | 
| c409_conflict | The request could not be completed because of a conflict in the request.  | 
| c410_gone | The requested page is no longer available.  | 
| c411_lengthRequired | The "Content-Length" is not defined. The server will not accept the request without it.  | 
| c412_preconditionFailed | The precondition given in the request evaluated to false by the server.  | 
| c413_requestEntityTooLarge | The server will not accept the request, because the request entity is too large.  | 
| c414_requestURITooLong | The server will not accept the request, because the URL is too long. Occurs when you convert a POST request to a GET request with a long query information.  | 
| c415_unsupportedMediaType | The server will not accept the request, because the media type is not supported.  | 
| c416_requestedRangeNotSatisfiable | The client has asked for a portion of the file, but the server cannot supply that portion.  | 
| c417_expectationFailed | The server cannot meet the requirements of the Expect request-header field.  | 
| c500_internalServerError | A generic error message, given when no more specific message is suitable.  | 
| c501_notImplemented | The server either does not recognize the request method, or it lacks the ability to fulfill the request.  | 
| c502_badGateway | The server was acting as a gateway or proxy and received an invalid response from the upstream server.  | 
| c503_serviceUnavailable | The server is currently unavailable (overloaded or down)  | 
| c504_gatewayTimeout | The server was acting as a gateway or proxy and did not receive a timely response from the upstream server.  | 
| c505_httpVersionNotSupported | The server does not support the HTTP protocol version used in the request.  | 
| c511_networkAuthenticationRequired | The client needs to authenticate to gain network access.  |