You can redirect your subdomain to an external URL.
Here's what you have to do.
1. Log in to your cPanel account.
2. In the Domains section, click on Subdomains.
3. Under the Modify a Subdomain list, you can see a list of subdomains.
4. Click on Manage Redirection on the subdomain you want to redirect.
5. Under the Redirection field, enter your website address.
6. Click on Save.
You have just created your redirection.
