Get Started

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
  • 11300: Invalid template URL
  • 11310: Invalid template token
  • 11320: Invalid template unclosed brackets
  • 11770: Empty response body
  • 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
  • 13211: Dial: Invalid ifMachine 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
  • 13217: Dial: Invalid record 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
  • 13226: Dial: Invalid country code
  • 13227: Dial: No International Authorization
  • 13230: Dial->Conference: Invalid muted value
  • 13231: Dial->Conference: Invalid endConferenceOnExit value
  • 13232: Dial->Conference: Invalid startConferenceOnEnter value
  • 13233: Dial->Conference: Invalid waitUrl value
  • 13234: Dial->Conference: Invalid waitMethod value
  • 13235: Dial->Conference: Invalid beep value
  • 13236: Dial->Conference: Invalid Conference Sid value
  • 13237: Dial->Conference: Invalid conference name
  • 13238: Dial->Conference: Invalid verb for waitUrl TwiML
  • 13241: Dial->SIP: Invalid method value
  • 13242: Dial->SIP: Invalid sendDigits value
  • 13243: Dial->SIP: Invalid SIP URI
  • 13245: Dial->SIP: Wrong API Version
  • 13247: Dial->SIP: Invalid callerID, invalid characters
  • 13248: Dial->SIP: Invalid callerID, too many characters
  • 13249: Dial->SIP: Invalid username or password attribute
  • 13252: Dial->SIP: Invalid header name
  • 13253: Dial->SIP: Header is too long
  • 13310: Gather: Invalid finishOnKey value
  • 13311: 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
  • 13614: Record: Invalid transcribe value
  • 13615: Record: maxLength too high for transcription
  • 13616: Record: playBeep must be true or false
  • 13710: Redirect: Invalid method value
  • 13910: Pause: Invalid length value
  • 14101: "To" Attribute is Invalid
  • 14102: SMS "From" Attribute is Invalid
  • 14103: SMS Invalid Body
  • 14104: SMS method attribute invalid
  • 14105: Sms Verb statusCallback attribute Invalid
  • 14106: SMS Reply TwiML document retrieval limit reached
  • 14107: SMS Rate message limit exceeded
  • 14108: SMS "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
  • 21100: Accounts Resource
  • 21200: Calls Resource
  • 21201: No 'To' number specified
  • 21202: 'To' number is a premium number
  • 21203: International calling not enabled
  • 21204: Call already initiated
  • 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: 'To' phone number not verified
  • 21220: Invalid call state
  • 21221: Invalid SipAuthUsername. Must be less than 256 chars
  • 21222: Invalid SipAuthUsername. Illegal chars
  • 21223: Invalid SipAuthPassword. Must be less than 256 chars
  • 21224: Invalid SipAuthPassword. Illegal chars
  • 21225: SipAuthPassword is required when providing SipAuthUsername
  • 21227: Headers portion of sip URI must be less than 1024 chars
  • 21228: Invalid SIP Header. Illegal chars in header name
  • 21229: Invalid SIP Header. Illegal chars in header value
  • 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
  • 21408: Permission to send an SMS has not been enabled for the region indicated by the 'To' number
  • 21420: ApplicationSid is not accessible
  • 21421: PhoneNumber is invalid
  • 21422: PhoneNumber is not available for purchase
  • 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
  • 21455: Invalid PlayUrl
  • 21456: Invalid CallbackUrl
  • 21457: AreaCode Parameter not Supported
  • 21458: PhoneNumber Provisioning Type Mismatch
  • 21470: Invalid AccountSid
  • 21471: Account does not exist
  • 21472: Account is not active
  • 21473: AccountSid you are transferring to is not related to the originating owner of the phone number
  • 21474: API User must be the parent account to transfer phone numbers.
  • 21475: Unable to update Status, invalid Status.
  • 21476: Unable to update Status for subaccount, parent account is suspended.
  • 21477: Unable to update Status for parent accounts
  • 21478: Unable to update Status for subaccount, subaccount has been suspended by Twilio
  • 21479: Unable to update Status for subaccount, subaccount has been closed.
  • 21480: Reached maximum number of subaccounts
  • 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 to send an SMS
  • 21603: 'From' phone number is required to send an SMS
  • 21604: 'To' phone number is required to send an SMS
  • 21605: Maximum body length is 160 characters
  • 21606: The 'From' phone number provided is not a valid, SMS-capable Twilio phone number.
  • 21607: The 'From' number must be the Sandbox phone number for trial accounts
  • 21608: The Sandbox number can send SMS messages only to verified numbers
  • 21609: Invalid StatusCallback url
  • 21610: SMS cannot be sent to the 'To' number because the customer has replied with STOP
  • 21611: This 'From' number has exceeded the maximum number of queued messages
  • 21612: The 'To' phone number is not currently reachable via SMS
  • 21613: PhoneNumber Requires Certification
  • 21614: 'To' number is not a valid mobile number
  • 21616: The 'From' number matches multiple numbers for your account
  • 21618: The message body cannot be sent