Warning 21711
Product: Programmable SMS
WARNING - 21711
Phone Number, Shortcode, or AlphaSender is not associated to the specified Messaging Service.
## Error - 21711
Phone Number, Shortcode, or AlphaSender is not associated to the specified Messaging Service.
Possible Causes
- The sender was never associated with a given Messaging Service.
Possible Solutions
Please add this number to a specified Messaging Service. See here for a code sample.