Common http response status codes

http status return code 1xx (Provisional Response)
A status code that indicates a provisional response and requires the requester to continue the operation.

http status return code Code Description
100 (Continue) The requester should continue making the request. The server returns this code to indicate that it has received the first part of the request and is waiting for the remainder.
101 (Switch protocol) The requester has asked the server to switch protocols, and the server has confirmed and is ready to switch.

http status return code 2xx (success)
A status code indicating that the request was successfully processed.

200 (Success) The server has successfully processed the request. Typically, this means that the server served the requested web page.
201 (Created) The request was successful and the server created the new resource.
202 (Accepted) The server has accepted the request but has not yet processed it.
203 (Unauthorized information) The server successfully processed the request, but the returned information may have come from another source.
204 (No content) The server successfully processed the request but did not return any content.
205 (Reset content) The server successfully processed the request but did not return any content.
206 (Part of the content) The server successfully processed part of the GET request.

http status return code 3xx (redirect)
indicates that further action is required to complete the request. Typically, these status codes are used for redirects.

300 (Multiple choices) In response to requests, the server can perform a variety of operations. The server can select an action based on the requester (user agent) or provide a list of actions for the requester to choose from.
301 (Permanently Moved) The requested web page has been permanently moved to a new location. When the server returns this response (in response to a GET or HEAD request), it automatically forwards the requester to the new location.
302 (Temporary Move) The server is currently responding to requests from a web page in a different location, but the requester should continue to use the original location for future requests.
303 (See other locations) The server returns this code when the requester should use separate GET requests to different locations to retrieve the response.

304 (Unmodified) The requested web page has not been modified since the last request. When the server returns this response, no web page content is returned.
305 (Use proxy) The requester can only use the proxy to access the requested web page. If the server returns this response, it also indicates that the requester should use a proxy.
307 (Temporary Redirect) The server is currently responding to requests from a web page in a different location, but the requester should continue to use the original location for future requests.

http status return codes 4xx (Request Error)
These status codes indicate that the request may have gone wrong, preventing the server from processing it.

400 (Bad Request) The server does not understand the syntax of the request.
401 (Unauthorized) The request requires authentication. For web pages that require login, the server may return this response.
403 (Forbidden) The server refused the request.
404 (Not Found) The server cannot find the requested web page.
405 (Method Disable) Disable the method specified in the request.
406 (Not Accepted) The requested web page cannot be responded to using the requested content properties.
407 (Proxy authorization required) This status code is similar to 401 (Unauthorized), but specifies that the requester should be authorized to use the proxy.
408 (Request Timeout) A timeout occurred while the server was waiting for a request.
409 (Conflict) The server had a conflict while completing the request. The server MUST include information about the conflict in the response.
410 (Deleted) The server will return this response if the requested resource has been permanently deleted.
411 (valid length required) The server does not accept requests without a valid content-length header field.
412 (Precondition not met) The server did not meet one of the preconditions set by the requester in the request.
413 (The request entity is too large) The server cannot process the request because the request entity is too large and exceeds the server's processing capabilities.
414 (The requested URI is too long) The requested URI (usually a URL) is too long and the server cannot handle it.
415 (Unsupported media type) The requested format is not supported by the requested page.
416 (The requested range does not meet the requirements) If the page cannot provide the requested range, the server will return this status code.
417 (Expectation not met) The server did not meet the requirements for the "expected" request header field.

http status return codes 5xx (Server Error)
These status codes indicate that an internal error occurred while the server was trying to process the request. These errors may be errors on the server itself rather than an error in the request.

500 (Internal Server Error) The server encountered an error and was unable to complete the request.
501 (Not yet implemented) The server does not have the functionality to complete the request. For example, this code may be returned when the server does not recognize the request method.
502 (Bad Gateway) The server, acting as a gateway or proxy, received an invalid response from the upstream server.
503 (Service Unavailable) The server is currently unavailable (due to overload or downtime for maintenance). Often, this is a temporary state.
504 (Gateway Timeout) The server acts as a gateway or proxy, but does not receive the request from the upstream server in time.
505 (HTTP version not supported) The server does not support the HTTP protocol version used in the request.

Some common http status return codes are:

200 - The server successfully returned the webpage

302 - Temporary move

404 - The requested web page does not exist

500 - Server Internal Error

502 - Bad gateway