# UpdateContactCallbackNumber
<a name="contact-actions-updatecontactcallbacknumber"></a>

Updates the contact callback number, which is the number used by the CreateCallbackContact action. This value defaults to the customer participant caller ID if this action is never used. 

## Parameter object
<a name="updatecontactcallbacknumber-parameter"></a>

```
{
    "CallbackNumber": The callback number to set. Must be a single, valid JSONPath reference, and cannot be set statically. 
}
```

## Results and conditions
<a name="updatecontactcallbacknumber-results"></a>

None.

## Errors
<a name="updatecontactcallbacknumber-errors"></a>
+ InvalidCallbackNumber - The callback number specified was not a valid (e.164) phone number.
+ CallbackNumberNotDialable - The callback number specified is not dialable by the instance.

## Restrictions
<a name="updatecontactcallbacknumber-restrictions"></a>

This is supported only in contact flows, transfer flows, and customer queue flows. This is not supported in whispers or hold flows. 

## Corresponding block in the UI
<a name="updatecontactcallbacknumber-ui"></a>

[Set callback number](https://docs.aws.amazon.com/connect/latest/adminguide/set-callback-number.html)