HTTP status codes (IANA registry)

Source: https://aidb.si/d/http-status-codes — Source: Internet Assigned Numbers Authority (IANA), HTTP Status Code Registry.

CodeReason phraseClassTemporary registrationDefining RFCReferences
100ContinueInformationalfalse9110RFC 9110, Section 15.2.1
101Switching ProtocolsInformationalfalse9110RFC 9110, Section 15.2.2
102ProcessingInformationalfalse2518RFC 2518
103Early HintsInformationalfalse8297RFC 8297
104Upload Resumption Supported (TEMPORARY - registered 2024-11-13, extension registered 2025-09-15, expires 2026-11-13)Informationaltruedraft-ietf-httpbis-resumable-upload-05
200OKSuccessfulfalse9110RFC 9110, Section 15.3.1
201CreatedSuccessfulfalse9110RFC 9110, Section 15.3.2
202AcceptedSuccessfulfalse9110RFC 9110, Section 15.3.3
203Non-Authoritative InformationSuccessfulfalse9110RFC 9110, Section 15.3.4
204No ContentSuccessfulfalse9110RFC 9110, Section 15.3.5
205Reset ContentSuccessfulfalse9110RFC 9110, Section 15.3.6
206Partial ContentSuccessfulfalse9110RFC 9110, Section 15.3.7
207Multi-StatusSuccessfulfalse4918RFC 4918
208Already ReportedSuccessfulfalse5842RFC 5842
226IM UsedSuccessfulfalse3229RFC 3229
300Multiple ChoicesRedirectionfalse9110RFC 9110, Section 15.4.1
301Moved PermanentlyRedirectionfalse9110RFC 9110, Section 15.4.2
302FoundRedirectionfalse9110RFC 9110, Section 15.4.3
303See OtherRedirectionfalse9110RFC 9110, Section 15.4.4
304Not ModifiedRedirectionfalse9110RFC 9110, Section 15.4.5
305Use ProxyRedirectionfalse9110RFC 9110, Section 15.4.6
306(Unused)Redirectionfalse9110RFC 9110, Section 15.4.7
307Temporary RedirectRedirectiontrue9110RFC 9110, Section 15.4.8
308Permanent RedirectRedirectionfalse9110RFC 9110, Section 15.4.9
400Bad RequestClient errorfalse9110RFC 9110, Section 15.5.1
401UnauthorizedClient errorfalse9110RFC 9110, Section 15.5.2
402Payment RequiredClient errorfalse9110RFC 9110, Section 15.5.3
403ForbiddenClient errorfalse9110RFC 9110, Section 15.5.4
404Not FoundClient errorfalse9110RFC 9110, Section 15.5.5
405Method Not AllowedClient errorfalse9110RFC 9110, Section 15.5.6
406Not AcceptableClient errorfalse9110RFC 9110, Section 15.5.7
407Proxy Authentication RequiredClient errorfalse9110RFC 9110, Section 15.5.8
408Request TimeoutClient errorfalse9110RFC 9110, Section 15.5.9
409ConflictClient errorfalse9110RFC 9110, Section 15.5.10
410GoneClient errorfalse9110RFC 9110, Section 15.5.11
411Length RequiredClient errorfalse9110RFC 9110, Section 15.5.12
412Precondition FailedClient errorfalse9110RFC 9110, Section 15.5.13
413Content Too LargeClient errorfalse9110RFC 9110, Section 15.5.14
414URI Too LongClient errorfalse9110RFC 9110, Section 15.5.15
415Unsupported Media TypeClient errorfalse9110RFC 9110, Section 15.5.16
416Range Not SatisfiableClient errorfalse9110RFC 9110, Section 15.5.17
417Expectation FailedClient errorfalse9110RFC 9110, Section 15.5.18
418(Unused)Client errorfalse9110RFC 9110, Section 15.5.19
421Misdirected RequestClient errorfalse9110RFC 9110, Section 15.5.20
422Unprocessable ContentClient errorfalse9110RFC 9110, Section 15.5.21
423LockedClient errorfalse4918RFC 4918
424Failed DependencyClient errorfalse4918RFC 4918
425Too EarlyClient errorfalse8470RFC 8470
426Upgrade RequiredClient errorfalse9110RFC 9110, Section 15.5.22
428Precondition RequiredClient errorfalse6585RFC 6585
429Too Many RequestsClient errorfalse6585RFC 6585
431Request Header Fields Too LargeClient errorfalse6585RFC 6585
451Unavailable For Legal ReasonsClient errorfalse7725RFC 7725
500Internal Server ErrorServer errorfalse9110RFC 9110, Section 15.6.1
501Not ImplementedServer errorfalse9110RFC 9110, Section 15.6.2
502Bad GatewayServer errorfalse9110RFC 9110, Section 15.6.3
503Service UnavailableServer errorfalse9110RFC 9110, Section 15.6.4
504Gateway TimeoutServer errorfalse9110RFC 9110, Section 15.6.5
505HTTP Version Not SupportedServer errorfalse9110RFC 9110, Section 15.6.6
506Variant Also NegotiatesServer errorfalse2295RFC 2295
507Insufficient StorageServer errorfalse4918RFC 4918
508Loop DetectedServer errorfalse5842RFC 5842
510Not Extended (OBSOLETED)Server errorfalse2774RFC 2774
511Network Authentication RequiredServer errorfalse6585RFC 6585