Provisional1xx
100 Trying
180 Ringing
181 Call Is BeingForwarded
182 Queued
183 SessionProgress
Successful 2xx
200 OK
202 Accepted
Redirection 3xx
300 Multiple Choices
301 Moved Permanently
302 Moved Temporarily
305 Use Proxy
380 AlternativeService
400 Bad Request
401 Unauthorized
402 Payment Required
403 Forbidden
404 NotFound
405 MethodNot 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
433 Anonymity Disallowed
436 Bad Identity-Info
437 Unsupported Certificate
438 InvalidIdentity 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 ExistAnywhere
606 Not Acceptable
