Skip to content
Skip to navigation
Skip to topbar
Twilio Logo
Twilio Docs
Search
Search
Messaging
Voice
Serverless
Flex
Studio
All docs...
SDKs
Help
Help
Search
Log in
Sign up
On this page
ERROR: 63003
Description
Possible Causes
Possible Solutions
On this page
ERROR: 63003
Description
Possible Causes
Possible Solutions
Channel could not find To address
Positive Feedback
Negative Feedback
ERROR: 63003
error-63003 page anchor
Positive Feedback
Negative Feedback
PROGRAMMABLE SMS
ERROR
Description
description page anchor
Positive Feedback
Negative Feedback
You have tried to send a message to a To address that is inactive or invalid.
Possible Causes
possible-causes page anchor
Positive Feedback
Negative Feedback
The To address is no invalid or longer belongs to a mobile user
The To address was entered or formatted incorrectly
Possible Solutions
possible-solutions page anchor
Positive Feedback
Negative Feedback
Ensure you have provided the correct To address for the user you are trying to reach
Ensure that the To address is still active