List of all HTTP Status Codes that every SEO Guy Should Know About

      Here is the list of all HTTP Status Codes:



1xx Informational:
  • Ø  100 Continue
  • Ø  101 Switching Protocols
  • Ø  102 Processing (WebDAV; RFC 2518)


2xx Success:
  • Ø  200 OK
  • Ø  201 Created
  • Ø  202 Accepted
  • Ø  203 Non-Authoritative Information (since HTTP/1.1)
  • Ø  204 No Content
  • Ø  205 Reset Content
  • Ø  206 Partial Content
  • Ø  207 Multi-Status (WebDAV; RFC 4918)
  • Ø  208 Already Reported (WebDAV; RFC 5842)
  • Ø  226 IM Used


3xx Redirection:
  • Ø  300 Multiple Choices
  • Ø  301 Moved Permanently
  • Ø  302 Found (Temp Moved)
  • Ø  303 See Other (since HTTP/1.1)
  • Ø  304 Not Modified
  • Ø  305 Use Proxy (since HTTP/1.1)
  • Ø  306 Switch Proxy
  • Ø  307 Temporary Redirect (since HTTP/1.1)
  • Ø  308 Permanent Redirect (RFC 7538)


4xx Client Error:
  • Ø  400 Bad Request
  • Ø  401 Unauthorized
  • Ø  402 Payment Required
  • Ø  403 Forbidden
  • Ø  404 Not Found
  • Ø  405 Method Not Allowed
  • Ø  406 Not Acceptable
  • Ø  407 Proxy Authentication Required
  • Ø  408 Request Timeout
  • Ø  409 Conflict
  • Ø  410 Gone
  • Ø  411 Length Required
  • Ø  412 Precondition Failed
  • Ø  413 Payload Too Large
  • Ø  414 URI Too Long
  • Ø  415 Unsupported Media Type
  • Ø  416 Range Not Satisfiable
  • Ø  417 Expectation Failed
  • Ø  418 I'm a teapot (RFC 2324)
  • Ø  421 Misdirected Request
  • Ø  422 Unprocessable Entity (WebDAV; RFC 4918)
  • Ø  423 Locked (WebDAV; RFC 4918)
  • Ø  424 Failed Dependency (WebDAV; RFC 4918)
  • Ø  426 Upgrade Required
  • Ø  428 Precondition Required
  • Ø  429 Too Many Requests
  • Ø  431 Request Header Fields Too Large
  • Ø  451 Unavailable For Legal Reasons


5xx Server Error:
  • Ø  500 Internal Server Error
  • Ø  501 Not Implemented
  • Ø  502 Bad Gateway
  • Ø  503 Service Unavailable
  • Ø  504 Gateway Timeout
  • Ø  505 HTTP Version Not Supported
  • Ø  507 Insufficient Storage
  • Ø  508 Loop Detected
  • Ø  510 Not Extended
  • Ø  511 Network Authentication Required


Unofficial codes:
  • Ø  103 Checkpoint
  • Ø  420 Method Failure
  • Ø  419 I'm a fox (Smoothwall/Foxwall)
  • Ø  420 Enhance Your Calm
  • Ø  450 Blocked by Windows Parental Controls (Microsoft)
  • Ø  498 Invalid Token (Esri)
  • Ø  499 Token Required (Esri)
  • Ø  499 Request has been forbidden by antivirus
  • Ø  509 Bandwidth Limit Exceeded
  • Ø  530 Site is frozen
  •  

CloudFlare:
  • Ø  520 Unknown Error
  • Ø  521 Web Server Is Down
  • Ø  522 Connection Timed Out
  • Ø  523 Origin Is Unreachable
  • Ø  524 A Timeout Occurred
  • Ø  525 SSL Handshake Failed
  • Ø  526 Invalid SSL Certificate


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