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Error and Warning Dictionary
10001
: Account is not active
10002
: Trial account does not support this feature
10003
: Incoming call rejected due to inactive account
11100
: Invalid URL format
11200
: HTTP retrieval failure
11205
: HTTP connection failure
11206
: HTTP protocol violation
11210
: HTTP bad host name
11215
: HTTP too many redirects
12100
: Document parse failure
12101
: Invalid Twilio Markup XML version
12102
: The root element must be Response
12200
: Schema validation warning
12300
: Invalid Content-Type
12400
: Internal Failure
13201
: Dial: Cannot Dial out from a Dial Call Segment
13210
: Dial: Invalid method value
13212
: Dial: Invalid timeout value
13213
: Dial: Invalid hangupOnStar value
13214
: Dial: Invalid callerId value
13215
: Dial: Invalid nested element
13216
: Dial: Invalid timeLimit value
13221
: Dial->Number: Invalid method value
13222
: Dial->Number: Invalid sendDigits value
13223
: Dial: Invalid phone number format
13224
: Dial: Invalid phone number
13225
: Dial: Forbidden phone number
13230
: Dial->Conference: Invalid muted value
13231
: Dial->Conference: Invalid endConferenceOnExit value
13232
: Dial->Conference: Invalid startConferenceOnEnter value
13233
: Dial->Conference: Invalid waitUrl
13234
: Dial->Conference: Invalid waitMethod
13235
: Dial->Conference: Invalid beep value
13236
: Dial->Conference: Invalid Conference Sid
13237
: Dial->Conference: Invalid Conference Name
13238
: Dial->Conference: Invalid Verb used in waitUrl TwiML
13310
: Gather: Invalid finishOnKey value
13312
: Gather: Invalid method value
13313
: Gather: Invalid timeout value
13314
: Gather: Invalid numDigits value
13320
: Gather: Invalid nested verb
13321
: Gather->Say: Invalid voice value
13322
: Gather->Say: Invalid loop value
13325
: Gather->Play: Invalid Content-Type
13410
: Play: Invalid loop value
13420
: Play: Invalid Content-Type
13510
: Say: Invalid loop value
13511
: Say: Invalid voice value
13520
: Say: Invalid text
13610
: Record: Invalid method value
13611
: Record: Invalid timeout value
13612
: Record: Invalid maxLength value
13613
: Record: Invalid finishOnKey value
13710
: Redirect: Invalid method value
13910
: Pause: Invalid length value
14101
: Invalid "To" attribute
14102
: Invalid "From" attribute
14103
: Invalid Body
14104
: Invalid Method attribute
14105
: Invalid statusCallback attribute
14106
: Document retrieval limit reached
14107
: SMS send rate limit exceeded
14108
: From phone number not SMS capable
14109
: SMS Reply message limit exceeded
14110
: Invalid Verb for SMS Reply
14111
: Invalid To phone number for Trial mode
20001
: Unknown parameters
20002
: Invalid FriendlyName
20003
: Permission Denied
20004
: Method not allowed
20005
: Account not active
20006
: Access Denied
21201
: No 'To' number specified
21202
: 'To' number is a premium number
21203
: International calling not enabled
21205
: Invalid URL
21206
: Invalid SendDigits
21207
: Invalid IfMachine
21208
: Invalid Timeout
21209
: Invalid Method
21210
: 'From' phone number not verified
21211
: Invalid 'To' Phone Number
21212
: Invalid 'From' Phone Number
21213
: 'From' phone number is required
21214
: 'To' Phone Number cannot be reached
21215
: Account not authorized to call phone number
21216
: Account not allowed to call phone number
21217
: Phone number does not appear to be valid
21218
: Invalid ApplicationSid
21219
: 'From' phone number not verified
21220
: Invalid call state
21401
: Invalid Phone Number
21402
: Invalid Url
21403
: Invalid Method
21404
: Inbound phone numbers not available to trial accounts
21405
: Cannot set VoiceFallbackUrl without setting Url
21406
: Cannot set SmsFallbackUrl without setting SmsUrl
21407
: This Phone Number type does not support SMS
21450
: Phone number already verified for your account
21451
: Invalid area code
21452
: No phone numbers found in area code
21453
: Phone number already verified for another account
21454
: Invalid CallDelay
21457
: AreaCode not supported
21458
: PhoneNumber provisioning type mismatch
21501
: Resource not available
21502
: Invalid callback url
21503
: Invalid transcription type
21504
: RecordingSid is required.
21601
: Phone number is not a valid SMS-capable inbound phone number
21602
: Message body is required
21603
: 'From' phone number is required to send an SMS
21604
: 'To' phone number is required to send an SMS
21605
: Maximum SMS body length is 160 characters
21606
: The 'From' phone number provided is not a valid, SMS-capable inbound phone number for your account
21608
: The Sandbox number can send messages only to verified numbers