Skip to contentSkip to navigationSkip to topbar
On this page

Phone Number is invalid



ERROR: 21421

error-21421 page anchor
ERROR

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

possible-causes page anchor
  • 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.
  • 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.

Need some help?

Terms of service

Copyright © 2024 Twilio Inc.