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Response Code for (4xx Client Error)

Specific-Response Type Code

BAD_REQUEST 400
UNAUTHORIZED 401
PAYMENT_REQUIRED 402
FORBIDDEN 403
NOT_FOUND 404
METHOD_NOT_ALLOWED 405
NOT_ACCEPTABLE 406
PROXY_AUTHENTICATION_REQUIRED 407
REQUEST_TIMEOUT 408
GONE 410
REQUEST_ENTITY_TOO_LARGE 413
REQUEST_URI_TOO_LONG 414
UNSUPPORTED_MEDIA_TYPE 415
UNSUPPORTED_URI_SCHEME 416
BAD_EXTENSION 420
EXTENSION_REQUIRED 421
INTERVAL_TOO_BRIEF 423
TEMPORARILY_UNAVAILABLE 480
CALL_OR_TRANSACTION_DOES_NOT_EXIST 481
LOOP_DETECTED 482
TOO_MANY_HOPS 483
ADDRESS_INCOMPLETE 484
AMBIGUOUS 485
BUSY_HERE 486
REQUEST_TERMINATED 487
NOT_ACCEPTABLE_HERE 488
BAD EVENT 489
REQUEST_PENDING 491
UNDECIPHERABLE 493

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Posted by sagitraz

Client Failure
400 Bad Request 41 Temporary Failure
401 Unauthorized 21 Call rejected (*)
402 Payment required 21 Call rejected
403 Forbidden 21 Call rejected
404 Not found 1 Unallocated number
405 Method not allowed 63 Service or option
unavailable
406 Not acceptable 79 Service/option not
implemented (+)
407 Proxy authentication required 21 Call rejected (*)
408 Request timeout 102 Recovery on timer expiry
410 Gone 22 Number changed
(w/o diagnostic)
413 Request Entity too long 127 Interworking (+)
414 Request-URI too long 127 Interworking (+)
415 Unsupported media type 79 Service/option not
implemented (+)
416 Unsupported URI Scheme 127 Interworking (+)
420 Bad extension 127 Interworking (+)
421 Extension Required 127 Interworking (+)
423 Interval Too Brief 127 Interworking (+)
480 Temporarily unavailable 18 No user responding
481 Call/Transaction Does not Exist 41 Temporary Failure
482 Loop Detected 25 Exchange - routing error
483 Too many hops 25 Exchange - routing error
484 Address incomplete 28 Invalid Number Format (+)
485 Ambiguous 1 Unallocated number
486 Busy here 17 User busy
487 Request Terminated --- (no mapping)
488 Not Acceptable here --- by Warning header

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Posted by yogendra