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Error 21421

ERROR - 21421

Phone Number is invalid

You tried to purchase a phone number for your account that was an invalid number. Please specify a valid phone number in E.164 format. You tried to purchase or lookup a phone number that is invalid or add a phone number to a Messaging Service with an invalid Phone Number SID.

Possible Causes

  • You tried to purchase or lookup a phone number that is invalid.
  • You tried to add an invalid Phone Number SID or Short Code SID to a Messaging Service.

Possible Solutions

  • For phone number lookup or purchase, please specify a valid phone number in E.164 format.
  • For adding a Phone Number to a Messaging Service, verify that the Phone Number SID or Short Code SID is correct and formatted properly, then retry the request.
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