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21712: Phone Number or Short Code is associated with another Messaging Service.

ERROR: 21712

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PROGRAMMABLE SMS
ERROR

Error - 21712

error---21712 page anchor

Phone Number or Short Code is associated with another Messaging Service.

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A Twilio phone number or short code can only be associated with one Messaging Service at a time.

Please delete the number from its existing Messaging Service before attempting to add it to a new Messaging Service. See here for a code sample. Removing a Twilio number from a Messaging Service will not remove the number from your account.