SIP Status Codes

The following methods are officially registered with IANA and thus are listed in sip-parameters. The list is complete as of 2007-06-15.

Provisional 1xx

• 100 Trying

• 180 Ringing

• 181 Call Is Being Forwarded

• 182 Queued

• 183 Session Progress

Successful 2xx

• 200 OK

• 202 Accepted

Redirection 3xx

• 300 Multiple Choices

• 301 Moved Permanently

• 302 Moved Temporarily

• 305 Use Proxy

• 380 Alternative Service

Request Failure 4xx

• 400 Bad Request

• 401 Unauthorized

• 402 Payment Required

• 403 Forbidden

• 404 Not Found

• 405 Method Not Allowed

• 406 Not Acceptable

• 407 Proxy Authentication Required

• 408 Request Timeout

• 410 Gone

• 412 Conditional Request Failed

• 413 Request Entity Too Large

• 414 Request-URI Too Long

• 415 Unsupported Media Type

• 416 Unsupported URI Scheme

• 417 Unknown Resource-Priority

• 420 Bad Extension

• 421 Extension Required

• 422 Session Interval Too Small

• 423 Interval Too Brief

• 428 Use Identity Header

• 429 Provide Referrer Identity

• 436 Bad Identity-Info

• 437 Unsupported Certificate

• 438 Invalid Identity Header

• 480 Temporarily Unavailable

• 481 Call/Transaction Does Not Exist

• 482 Loop Detected

• 483 Too Many Hops

• 484 Address Incomplete

• 485 Ambiguous

• 486 Busy Here

• 487 Request Terminated

• 488 Not Acceptable Here

• 489 Bad Event

• 491 Request Pending

• 493 Undecipherable

• 494 Security Agreement Required

Server Failure 5xx

• 500 Server Internal Error

• 501 Not Implemented

• 502 Bad Gateway

• 503 Service Unavailable

• 504 Server Time-out

• 505 Version Not Supported

• 513 Message Too Large

• 580 Precondition Failure

Global Failures 6xx

• 600 Busy Everywhere

• 603 Decline

• 604 Does Not Exist Anywhere

• 606 Not Acceptable