To create a subdomain, use the link to cPanel’s Subdomains interface (cPanel >> Home >> Domains >> Subdomains). To create multiple addon domains with the same username and different extensions (for example, example.com and example.net

Enter the addon domain’s name in the “New Domain Name” text box. cPanel will automatically populate the “Subdomain” and “Document Root” text boxes. Select the “Create an FTP account associated with this addon Domain” checkbox if you want

Addon Domains: Addon domains allow you to control multiple domains from a single account. An addon domain links a new domain name to a directory in your account and then stores its file in the directory. Here are some basic steps to create an addon domain