A Complete List of HTTP Status Lines

The HTTP status line is the term given to the HTTP status code (the actual code number) when accompanied by the HTTP reason phrase1 (the short description).

 

We also keep a list of HTTP status code errors (4xx and 5xx) along with some tips on how to fix them.

 

Note: Though technically incorrect, HTTP status lines are often referred to as simply HTTP status codes.

 

HTTP Status Code Categories

As you can see below, HTTP status codes are three-digit integers. The very first digit is used to identify the code within a specific category - one of these five:

 
  • 1XX: Informational - the request was accepted or the process is continuing.
  • 2XX: Confirms that the action completed successfully or was understood.
  • 3XX: Redirection - something else needs to take place in order to complete the request.
  • 4XX: Client error that indicates that the request can't complete or contains the wrong syntax.
  • 5XX: Server error that indicates that the server failed to complete a request that was supposedly valid.
 

Applications that understand HTTP status codes don't have to know all of the codes, which means an unknown code also has an unknown HTTP reason phrase, which won't give the user much information. However, these HTTP applications do have to understand the categories or classes as we've described them above.

 

If the software doesn't know what the specific code means, it can at the very least identify the class. For example, if a 490 status code is unknown to the application, it can treat it as a 400 because it's in the same category, and can then assume that there's something wrong with the client request.

 

HTTP Status Lines (HTTP Status Codes + HTTP Reason Phrases)

Status Code Reason Phrase
100 Continue
101 Switching Protocols
102 Processing
200 OK
201 Created
202 Accepted
203 Non-Authoritative Information
204 No Content
205 Reset Content
206 Partial Content
207 Multi-Status
300 Multiple Choices
301 Moved Permanently
302 Found
303 See Other
304 Not Modified
305 Use Proxy
307 Temporary Redirect
308 Permanent Redirect
400 Bad Request
401 Unauthorized
402 Payment Required
403 Forbidden
404 Not Found
405 Method Not Allowed
406 Not Acceptable
407 Proxy Authentication Required
408 Request Time-out
409 Conflict
410 Gone
411 Length Required
412 Precondition Failed
413 Request Entity Too Large
414 Request-URI Too Large
415 Unsupported Media Type
416 Request Range Not Satisfiable
417 Expectation Failed
421 Misdirected Request
422 Unprocessable Entity
423 Locked
424 Failed Dependency
425 Unordered Collection
426 Upgrade Required
428 Precondition Required
429 Too Many Requests
431 Request Header Fields Too Large
451 Unavailable For Legal Reasons
500 Internal Server Error
501 Not Implemented
502 Bad Gateway
503 Service Unavailable
504 Gateway Time-out
505 HTTP Version Not Supported
506 Variant Also Negotiates
507 Insufficient Storage
508 Loop Detected
510 Not Extended
511 Network Authentication Required
 

[1] The HTTP reason phrases that accompany HTTP status codes are only recommended. A different reason phrase is allowed per ​RFC 2616 6.1.1. You might see HTTP reason phrases replaced with a more "friendly" description or in a local language.

 

Unofficial HTTP Status Lines

The HTTP status lines below might be used by some third-party services as error responses, but they are not specified by any RFC.

 
Status Code Reason Phrase
103 Checkpoint
420 Method Failure
420 Enhance Your Calm
440 Login Timeout
449 Retry With
450 Blocked by Windows Parental Controls
451 Redirect
498 Invalid Token
499 Token Required
499 Request has been forbidden by antivirus
509 Bandwidth Limit Exceeded
530 Site is frozen
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