100 - 199 [Informational]
101 Switching Protocols
200 - 299 [Success]
200 OK
203 Non-Authoritative Information (since HTTP/1.1)
204 No Content
300 - 399 [Redirection]
300 Multiple Choices
301 Moved Permanently
302 Found
304 Not Modified
307 Temporary Redirect (since HTTP/1.1)
400 - 499 [Client Error]
400 Bad Request
401 Unauthorized
402 Payment Required
403 Forbidden
404 Not Found
405 Method Not Allowed
408 Request Timeout
414 Request-URI Too Long
429 Too Many Requests
431 Request Header Fields Too Large
500 - 599 [Client Error]
500 Internal Server Error
501 Not Implemented
502 Bad Gateway
503 Service Unavailable
504 Gateway Timeout
505 HTTP Version Not Supported