Value,Description,Reference
100,Continue,"[RFC9110, Section 15.2.1]"
101,Switching Protocols,"[RFC9110, Section 15.2.2]"
102,Processing,[RFC2518]
103,Early Hints,[RFC8297]
104,"Upload Resumption Supported (TEMPORARY - registered 2024-11-13, extension registered 2025-09-15, expires 2026-11-13)",[draft-ietf-httpbis-resumable-upload-05]
105-199,Unassigned,
200,OK,"[RFC9110, Section 15.3.1]"
201,Created,"[RFC9110, Section 15.3.2]"
202,Accepted,"[RFC9110, Section 15.3.3]"
203,Non-Authoritative Information,"[RFC9110, Section 15.3.4]"
204,No Content,"[RFC9110, Section 15.3.5]"
205,Reset Content,"[RFC9110, Section 15.3.6]"
206,Partial Content,"[RFC9110, Section 15.3.7]"
207,Multi-Status,[RFC4918]
208,Already Reported,[RFC5842]
209-225,Unassigned,
226,IM Used,[RFC3229]
227-299,Unassigned,
300,Multiple Choices,"[RFC9110, Section 15.4.1]"
301,Moved Permanently,"[RFC9110, Section 15.4.2]"
302,Found,"[RFC9110, Section 15.4.3]"
303,See Other,"[RFC9110, Section 15.4.4]"
304,Not Modified,"[RFC9110, Section 15.4.5]"
305,Use Proxy,"[RFC9110, Section 15.4.6]"
306,(Unused),"[RFC9110, Section 15.4.7]"
307,Temporary Redirect,"[RFC9110, Section 15.4.8]"
308,Permanent Redirect,"[RFC9110, Section 15.4.9]"
309-399,Unassigned,
400,Bad Request,"[RFC9110, Section 15.5.1]"
401,Unauthorized,"[RFC9110, Section 15.5.2]"
402,Payment Required,"[RFC9110, Section 15.5.3]"
403,Forbidden,"[RFC9110, Section 15.5.4]"
404,Not Found,"[RFC9110, Section 15.5.5]"
405,Method Not Allowed,"[RFC9110, Section 15.5.6]"
406,Not Acceptable,"[RFC9110, Section 15.5.7]"
407,Proxy Authentication Required,"[RFC9110, Section 15.5.8]"
408,Request Timeout,"[RFC9110, Section 15.5.9]"
409,Conflict,"[RFC9110, Section 15.5.10]"
410,Gone,"[RFC9110, Section 15.5.11]"
411,Length Required,"[RFC9110, Section 15.5.12]"
412,Precondition Failed,"[RFC9110, Section 15.5.13]"
413,Content Too Large,"[RFC9110, Section 15.5.14]"
414,URI Too Long,"[RFC9110, Section 15.5.15]"
415,Unsupported Media Type,"[RFC9110, Section 15.5.16]"
416,Range Not Satisfiable,"[RFC9110, Section 15.5.17]"
417,Expectation Failed,"[RFC9110, Section 15.5.18]"
418,(Unused),"[RFC9110, Section 15.5.19]"
419-420,Unassigned,
421,Misdirected Request,"[RFC9110, Section 15.5.20]"
422,Unprocessable Content,"[RFC9110, Section 15.5.21]"
423,Locked,[RFC4918]
424,Failed Dependency,[RFC4918]
425,Too Early,[RFC8470]
426,Upgrade Required,"[RFC9110, Section 15.5.22]"
427,Unassigned,
428,Precondition Required,[RFC6585]
429,Too Many Requests,[RFC6585]
430,Unassigned,
431,Request Header Fields Too Large,[RFC6585]
432-450,Unassigned,
451,Unavailable For Legal Reasons,[RFC7725]
452-499,Unassigned,
500,Internal Server Error,"[RFC9110, Section 15.6.1]"
501,Not Implemented,"[RFC9110, Section 15.6.2]"
502,Bad Gateway,"[RFC9110, Section 15.6.3]"
503,Service Unavailable,"[RFC9110, Section 15.6.4]"
504,Gateway Timeout,"[RFC9110, Section 15.6.5]"
505,HTTP Version Not Supported,"[RFC9110, Section 15.6.6]"
506,Variant Also Negotiates,[RFC2295]
507,Insufficient Storage,[RFC4918]
508,Loop Detected,[RFC5842]
509,Unassigned,
510,Not Extended (OBSOLETED),[RFC2774][Status change of HTTP experiments to Historic]
511,Network Authentication Required,[RFC6585]
512-599,Unassigned,