# 21300: Invalid BYOC trunk SID

Log Type: APPLICATION

Log Level: ERROR

## Description

You have specified a BYOC trunk SID that is malformed or non-existent.

### Possible causes

* The SID in question is not formatted correctly. A valid BYOC trunk SID starts with prefix "BY" and is 34 characters in length.
* The BYOC trunk identified by the SID does not exist. If it existed in the past, it has since been removed.
* The BYOC trunk exists but ownership is with a different account.

### Possible solutions

Make sure you submit the SID of a BYOC trunk that you can locate within your account.