How to delete a Subdomain?
A subdomain is anything that replaces the www in an original domain name www.firstdomain.com to subdomain.firstdomain.com. A subdomain is great for creating awareness to specific content areas of your website. Depending on your Hosting account you can add as many subdomains as you want. Also, you can create multiple subdomains, i.e. third.second.firstdomain.com
Step 1: Log into cPanel.
Step 2: Go to the Domains section and click on Subdomains icon.
Step 3 At the bottom, under Actions, click Remove.
Click here to learn how to create a Subdomain.