# 36001: Broadcast SID Not Found

Log Type: APPLICATION

Log Level: ERROR

## Description

The Broadcast SID in your request wasn't found. Provide a non-empty Broadcast SID that matches an existing Broadcast resource. Broadcast SIDs are 34 alphanumeric characters prefixed with `BC`.

### Possible causes

* You didn't include a Broadcast SID in the request.
* The Broadcast SID does not exist.
* The value is not a valid Broadcast SID format. Broadcast SIDs use a `BC` prefix and 34 alphanumeric characters.

### Possible solutions

* Send a non-empty Broadcast SID.
* Verify that the Broadcast SID is 34 alphanumeric characters and starts with `BC`.
* Use the SID for an existing broadcast before you retry the request.

#### Additional resources

* [Messaging API overview](/docs/messaging/api)
* [What is a SID?](/docs/glossary/what-is-a-sid)
* [Messages resource](/docs/messaging/api/message-resource)