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Internet Assigned Numbers Authority

Hypertext Transfer Protocol (HTTP) Status Code Registry

Last Updated
2024-11-13
Available Formats

XML
HTML
Plain text

Registry included below

HTTP Status Codes

Registration Procedure(s)
IETF Review
Reference
[RFC9110, Section 16.2.1]
Note
1xx: Informational - Request received, continuing process2xx: Success - The action was successfully received, understood, and accepted3xx: Redirection - Further action must be taken in order to complete the request4xx: Client Error - The request contains bad syntax or cannot be fulfilled5xx: Server Error - The server failed to fulfill an apparently valid request
Available Formats

CSV
ValueDescriptionReference
100Continue[RFC9110, Section 15.2.1]
101Switching Protocols[RFC9110, Section 15.2.2]
102Processing[RFC2518]
103Early Hints[RFC8297]
104Upload Resumption Supported (TEMPORARY - registered 2024-11-13, expires 2025-11-13)[draft-ietf-httpbis-resumable-upload-05]
105-199Unassigned
200OK[RFC9110, Section 15.3.1]
201Created[RFC9110, Section 15.3.2]
202Accepted[RFC9110, Section 15.3.3]
203Non-Authoritative Information[RFC9110, Section 15.3.4]
204No Content[RFC9110, Section 15.3.5]
205Reset Content[RFC9110, Section 15.3.6]
206Partial Content[RFC9110, Section 15.3.7]
207Multi-Status[RFC4918]
208Already Reported[RFC5842]
209-225Unassigned
226IM Used[RFC3229]
227-299Unassigned
300Multiple Choices[RFC9110, Section 15.4.1]
301Moved Permanently[RFC9110, Section 15.4.2]
302Found[RFC9110, Section 15.4.3]
303See Other[RFC9110, Section 15.4.4]
304Not Modified[RFC9110, Section 15.4.5]
305Use Proxy[RFC9110, Section 15.4.6]
306(Unused)[RFC9110, Section 15.4.7]
307Temporary Redirect[RFC9110, Section 15.4.8]
308Permanent Redirect[RFC9110, Section 15.4.9]
309-399Unassigned
400Bad Request[RFC9110, Section 15.5.1]
401Unauthorized[RFC9110, Section 15.5.2]
402Payment Required[RFC9110, Section 15.5.3]
403Forbidden[RFC9110, Section 15.5.4]
404Not Found[RFC9110, Section 15.5.5]
405Method Not Allowed[RFC9110, Section 15.5.6]
406Not Acceptable[RFC9110, Section 15.5.7]
407Proxy Authentication Required[RFC9110, Section 15.5.8]
408Request Timeout[RFC9110, Section 15.5.9]
409Conflict[RFC9110, Section 15.5.10]
410Gone[RFC9110, Section 15.5.11]
411Length Required[RFC9110, Section 15.5.12]
412Precondition Failed[RFC9110, Section 15.5.13]
413Content Too Large[RFC9110, Section 15.5.14]
414URI Too Long[RFC9110, Section 15.5.15]
415Unsupported Media Type[RFC9110, Section 15.5.16]
416Range Not Satisfiable[RFC9110, Section 15.5.17]
417Expectation Failed[RFC9110, Section 15.5.18]
418(Unused)[RFC9110, Section 15.5.19]
419-420Unassigned
421Misdirected Request[RFC9110, Section 15.5.20]
422Unprocessable Content[RFC9110, Section 15.5.21]
423Locked[RFC4918]
424Failed Dependency[RFC4918]
425Too Early[RFC8470]
426Upgrade Required[RFC9110, Section 15.5.22]
427Unassigned
428Precondition Required[RFC6585]
429Too Many Requests[RFC6585]
430Unassigned
431Request Header Fields Too Large[RFC6585]
432-450Unassigned
451Unavailable For Legal Reasons[RFC7725]
452-499Unassigned
500Internal Server Error[RFC9110, Section 15.6.1]
501Not Implemented[RFC9110, Section 15.6.2]
502Bad Gateway[RFC9110, Section 15.6.3]
503Service Unavailable[RFC9110, Section 15.6.4]
504Gateway Timeout[RFC9110, Section 15.6.5]
505HTTP Version Not Supported[RFC9110, Section 15.6.6]
506Variant Also Negotiates[RFC2295]
507Insufficient Storage[RFC4918]
508Loop Detected[RFC5842]
509Unassigned
510Not Extended (OBSOLETED)[RFC2774][Status change of HTTP experiments to Historic]
511Network Authentication Required[RFC6585]
512-599Unassigned
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