100’s - Informational codes used to relay information between client and server during a request. Example 100 code: The server received the request headers and determined the client is okay to continue sending the request body.
200’s - success codes. These indicate that the request issued was successfully fulfilled.
300’s - redirect codes. These codes are used to tell the browser or server that some other action needs to take place to complete the previous request.
400’s - client errors. These indicates an error on the requesters behalf.
500’s - server errors. These indicates an error on the servers behalf.