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HTTP Codes

1xx Informational Codes
100Continue
101Switching Protocols
102Processing
2xx Success Codes
200OK
201Created
202Accepted
203Non-Authoritative Information
204No Content
205Reset Content
206Partial Content
207Multi-Status
208Already Reported
226IM Used
3xx Redirection Codes
300Multiple Choices
301Moved Permanently
302Found
303See Other
304Not Modified
305Use Proxy
306Switch Proxy
307Temporary Redirect
308Permanent Redirect
4xx Client Error Codes
400Bad Request
401Unauthorized
402Payment Required
403Forbidden
404Not Found
405Method Not Allowed
406Not Acceptable
407Proxy Authentication Required
408Request Timeout
409Conflict
410Gone
411Length Required
412Precondition Failed
413Request Entity Too Large
414Request-URI Too Long
415Unsupported Media Type
416Requested Range Not Satisfiable
417Expectation Failed
418I'm a teapot
419Authentication Timeout
420Method Failure (Spring Framework)
420Enhance Your Calm (Twitter)
422Unprocessable Entity
423Locked
424Failed Dependency
425Upgrade Required
426Precondition Required
428Precondition Required
429Too Many Requests
431Request Header Fields Too Large
440Login Timeout (Microsoft)
444No Response (Nginx)
449Retry With (Microsoft)
450Blocked by Windows Parental Controls (Microsoft)
451Unavailable For Legal Reasons
451Redirect (Microsoft)
494Request Header Too Large (Nginx)
495Cert Error (Nginx)
496No Cert (Nginx)
497HTTP to HTTPS (Nginx)
498Token expired/invalid (Esri)
499Client Closed Request (Nginx)
499Token required (Esri)
5xx Server Error Codes
500Internal Server Error
501Not Implemented
502Bad Gateway
503Service Unavailable
504Gateway Timeout
505HTTP Version Not Supported
506Variant Also Negotiates
507Insufficient Storage
508Loop Detected
509Bandwidth Limit Exceeded
510Not Extended
511Network Authentication Required
598Network read timeout error
599Network connect timeout error