---
page_type: error
code: 63003
message: "63003: Channel could not find To address"
level: ERROR
product: Programmable SMS
---

## Description

You have tried to send a message to a To address that is inactive or invalid.

### Possible Causes

- The To address is no invalid or longer belongs to a mobile user
- The To address was entered or formatted incorrectly

### Possible Solutions

- Ensure you have provided the correct To address for the user you are trying to reach
- Ensure that the To address is still active