SIP Response Codes

This page gives a short overview about the SIP response codes for errors. A detailed description of the SIP response code can be found in "RFC 3261 - SIP: Session Initiation Protocol".

SIP Response Codes, Class 4: Request error

CodeDescription
400Bad Request
401Unauthorized
402Payment Required
403Forbidden
404Not Found
405Method Not Allowed
406Not Acceptable
407Proxy Authentication Required
408Request Timeout
410Gone
413Request Entity Too Large
414Request-URI Too Long
415Unsupported Media Type
416Unsupported URI Scheme
420Bad Extension
421Extension Required
423Interval Too Brief
480Temporarily Unavailable
481Call/Transaction Does Not Exist
482Loop Detected
483Too Many Hops
484Address Incomplete
485Ambiguous
486Busy Here
487Request Terminated
488Not Acceptable Here
491Request Pending
493Undecipherable

SIP response codes, class 5: server-error

CodeDescription
500Server Internal Error
501Not Implemented
502Bad Gateway
503Service Unavailable
504Server Time-out
505Version Not Supported
513Message Too Large

SIP response codes, class 6: globale-error

CodeDescription
600Busy Everywhere
603Decline
604Does Not Exist Anywhere
606Not Acceptable

Version 6.0