HTTP Status Codes — Complete List

All HTTP status codes from the IANA HTTP Status Code Registry, grouped by class. Click any code for the full guide.

1xx Informational

Informational responses (100–199) indicate that the server has received the request and the client should continue. These are interim responses used primarily in protocol negotiation.

Code	Name	Guide
100	Continue	Guide
101	Switching Protocols	Guide
102	Processing	Guide
103	Early Hints	Guide
104	Upload Resumption Supported	Guide

2xx Success

Success responses (200–299) indicate the request was received, understood, and accepted. The specific code tells the client how to interpret the response body and what action, if any, was taken.

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

3xx Redirect Codes

Redirection responses (300–399) indicate the client must take additional action to complete the request. The choice between permanent and temporary, and between method-preserving and non-preserving redirects, has real implications for SEO, caching, and client behavior.

Code	Name	Guide
300	Multiple Choices	Guide
301	Moved Permanently	Guide
302	Found	Guide
303	See Other	Guide
304	Not Modified	Guide
305	Use Proxy	Guide
306	Unused	Guide
307	Temporary Redirect	Guide
308	Permanent Redirect	Guide

4xx Client Errors

Client error responses (400–499) indicate the server cannot process the request due to a problem on the client side — malformed syntax, missing authentication, insufficient permissions, or missing resources.

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

5xx Server Errors

Server error responses (500–599) indicate the server failed to fulfill a valid request. These are almost always actionable on the server side and should be monitored in production.

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