Code	Name	Explanation
100 Informational codes
100	Continue	Indicates that a partial request has been received and the rest of the request should be submitted.
101	Switching Protocols	Agreement to switch the version of the HTTP protocol.
200 Successful codes
200	OK	The request completed successfully.
201	Created	The request resulted in the creation of a new URI.
202	Accepted	The request has been accepted for processing, but the processing is not finished yet.
203	Non-Authoritative Information	The data returned is not necessarily from the original source (could be from a proxy).
204	No Content	There is no entity data to go along with the response and the client should not change the current document view.
205	Reset Content	The client should reset the current document view.
206	Partial Content	The server is responding with the results to a partial get request.
300 Redirection codes
300	Multiple Choices	There are multiple locations that satisfy the client request.
301	Moved Permanently	The client should permanently reset the current URI to be the URI specified.
302	Moved Temporarily	The client should reset the current URI to be the URI specified for this request.
303	See Other	The client should get the response from a different URI by performing another GET request.
304	Not Modified	The target URI has not changed since the client's cached version was retrieved.
305	Use Proxy	The requested entity must be accessed through a proxy.
400 Client Error codes
400	Bad Request	The request was not understood by the server.
401	Unauthorized	The request requires user authentication.
402	Payments Required	The request requires a payment by the client.
403	Forbidden	The authenticated user does not have permission to access this resource.
404	Not Found	The specified resource does not exist.
405	Method Not Allowed	The request method is not supported by this server.
406	None Acceptable	The resource exists but it may not have the proper content type for the client.
407	Proxy Authentication Required	The client must first authenticate with the proxy.
408	Request Timeout	The client did not complete the request in time.
409	Conflict	The request could not be completed due to a resource conflict.
410	Gone	The resource is no longer available.
411	Length Required	The server requires a content-length header in the client's request.
500 Server Error codes
500	Internal Server Error	Some unexpected condition prevented the server from completing the request.
501	Not Implemented	The server does not support the request received.
502	Bad Gateway	The gateway could not access the upstream server.
503	Service Unavailable	The server is unable to handle the request at this time.
504	Gateway Timeout	The upstream server did not respond to the gateway in time.