# 21265: 'To' number cannot be a Short Code

Log Type: APPLICATION

Log Level: ERROR

## Description

You attempted to send an SMS, but the `To` phone number you supplied was a [Short Code](/docs/glossary/what-is-a-short-code). Twilio numbers cannot send messages to short codes at this time whether they are Twilio short codes or external short codes.

### Possible causes

You attempted to send an SMS to Short Code.

### Possible solutions

Ensure you are not attempting to send messages to Short Codes. These sender types cannot receive messages from Twilio numbers.