# 80303: Not Found Short Code Sid

Log Level: WARNING

## Description

This warning indicates that the `ShortCodeSid` or short code resource `Sid` in your request could not be found for the account making the request. Short code resources use the `SC` SID prefix, and Messaging Services manage them through the `/Services/{ServiceSid}/ShortCodes` subresource.

### Possible causes

* The `ShortCodeSid` value is incorrect, malformed, or does not reference an existing short code resource on your account. Short code SIDs use the `SC` prefix.
* The short code exists, but it belongs to a different Account SID or subaccount than the credentials used for the request. Twilio short code resources are tied to the account that created them.
* You are trying to fetch or remove a short code from a Messaging Service by using a `Sid` that is not associated with that service. Twilio uses the `/Services/{ServiceSid}/ShortCodes/{Sid}` subresource for those operations.

### Possible solutions

* Verify that the short code resource exists on the same account as the API credentials you are using. If needed, list or fetch your short code resources first and confirm the `SC` SID before retrying the request.
* If you are adding a short code to a Messaging Service, pass the correct `ShortCodeSid` in the request to `POST /Services/{ServiceSid}/ShortCodes`.
* If you are retrieving or deleting a short code from a Messaging Service, confirm both the `ServiceSid` and the short code `Sid` so the request targets the correct subresource.
* Manage active short codes from the Short Codes section of Numbers and Senders or through Trust Hub if you need to confirm registration and account ownership before associating the short code with a Messaging Service.

#### Additional resources

* [Messaging Services](/docs/messaging/services)
* [ShortCodes subresource](/docs/messaging/api/services-shortcode-resource)
* [Short Code Numbers](/docs/numbers-and-senders/short-codes)