- 200 OK
- 201 Created
- 202 Accepted
- 203 Non-Authoritative Information
- 204 No Content
- 301 Moved Permanently
- 400 Bad Request
- 401 Unauthorized
- 403 Forbiden
- 404 Not Found
- 405 Method Not Allowed
- 414 Request-URI Too Long
- 415 Unsupported Media Type
- 418 I'm a teapot (RFC 2324)
- 420 Enhance Your Calm(Twitter)
- 422 Unprocessable Entity (WebDAV)
- 423 Locked (WebDAV)
- 426 Upgrade Required
- 429 Too Many Requests
- 431 Request Header Fields Too Large
- 500 Internal Server Error
- 502 Bad Gateway
- 503 Service Unavailable
- 504 Gateway Timeout
- 509 Bandwidth Limit Exceeded (Apache)