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'To' number is not a valid mobile number

ERROR: 21614

error-21614 page anchor

You have attempted to send a SMS with a 'To' number that is not a valid mobile number. It is likely that the number that you have specified is a landline number or is an invalid number.

Possible Causes

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  • The number you provided may be a landline number.
  • The number you provided may be invalid or formatted incorrectly.
  • If you are attempting to send SMS to Internet of Things (IoT) or machine-to-machine (M2M) numbers, the numbers may use a non-standard format that Twilio has not added to our number validation system yet.

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