List of Internet/Web error codes with meanings

Error Page Not Found

Many a times, while browsing the Internet, you might come across various error codes. While some of the error code are self explanatory, some leaves the users to ponder around. Here, I'm listing all the error codes with their meanings. Bookmark this page as this might come handy to you someday!

1XX codes (Information)

This group of codes evaluates a provisional response, inclusing only the Status-Line, and optional headers.

100 - Continue
101 - Switching Protocols
102 - Processing

2XX codes (Success)

This group of codes evaluate that the action requested by the user has been received, understood, accepted, and or processed successfully.

200 - OK
201 - Created
202 - Accepted
203 - Non-Authoritative Information
204 - No Content
205 - Reset Content
206 - Partial Content
207 - Multi-Status
208 - Already Reported
226 - IM Used

3XX codes (Redirection)

This group of codes evaluates that the user must take additional action to complete the sent request.

300 - Multiple Choices
301 - Moved Permanently
302 - Found
305 - Use Proxy
306 - Switch Proxy
307 - Temporary Redirect
308 - Permanent Redirect

4XX codes (Client Error)

This group of code is made for situations where the client is seem to have erred.

400 - Bad Request
401 - Unauthorized (RFC 7235)
402 - Payment Required
403 - Forbidden
404 - Not Found
405 - Method Not Allowed
406 - Not Acceptable
407 - Proxy Authentication Required
408 - Request Timeout
409 - Conflict
410 - Gone
411 - Length Required
412 - Precondition Failed
413 - Payload Too Large
414 - URI Too Long
415 - Unsupported Media Type
416 - Range Not Satisfiable
417 - Expectation Failed
418 - I'm a teapot
421 - Misdirected Request
422 - Unprocessable Entity
423 - Locked
424 - Failed Dependency
426 - Upgrade Required
428 - Precondition Required
429 - Too Many Requests
431 - Request Header Fields Too Large
451 - Unavailable For Legal Reasons

5XX codes (Server Error)

This group of code evaluates that the server has failed to respond to a valid request.

500 Internal Server Error
501 Not Implemented
502 Bad Gateway
503 Service Unavailable
504 Gateway Timeout
505 HTTP Version Not Supported
506 Variant Also Negotiates
507 Insufficient Storage
508 Loop Detected
510 Not Extended
511 Network Authentication Required

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