HTTP Standard Response Codes

Standard HTTP response codes.(ilustative table)

Family	Code	Description
1XX Informational	100	Continue
	101	Switching Protocols
	102	Processing
	103	Early Hints
2XX Successful	200	OK (Important Status for SEO)
	201	Created
	202	Accepted
	203	Non-Authoritative Information
	204	No Content
	205	Reset Content
	206	Partial Content
	207	Multi-Status
	208	Already Reported
3XX Redirection	300	Multiple Choices
	301	Moved Permanently (Important Status for SEO)
	302	Found (Previously “Moved Temporarily”) (Important Status for SEO)
	303	See Other
	304	Not Modified
	305	Use Proxy
	306	Switch Proxy
	307	Temporary Redirect (Important Status for SEO)
	308	Permanent Redirect (Important Status for SEO)
4XX Client Error	400	Bad Request
	401	Unauthorized
	402	Payment Required
	403	Forbidden
	404	Not Found (Important Status for SEO)
	405	Method Not Allowed
	406	Not Acceptable
	407	Proxy Authentication Required
	408	Request Timeout
	409	Conflict
	410	Gone (Important Status for SEO)
	411	Length Required
	412	Precondition Failed
	413	Payload Too Large
	414	URI Too Long
	415	Unsupported Media Type
	416	Range Not Satisfiable
	417	Expectation Failed
	418	I’m a teapot (Joke)
	421	Misdirect Request
	422	Unprocessable Entity
	423	Locked
	424	Failed Dependency
	425	Too Early
	426	Upgrade Required
	428	Precondition Required
	429	Too Many Requests
	431	Request Header Fields Too Large
	451	Unavailable For Legal Reasons
5XX Server Error	500	Internal Server Error (Important Status for SEO)
	501	Not Implemented
	502	Bad Gateway
	503	Service Unavailable (Important Status for SEO)
	504	Gateway Timeout
	505	HTTP Version Not Supported
	506	Variant Also Negotiates
	507	Insufficient Storage
	508	Loop Detected
	510	Not Extended
	511	Network Authentication Required