Here are 2 ways to list all domaind for a cPanel account, including: Subdomains, Addon domains, Aliases and Parked domains.
- From cPanel
Login to the user cPanel and go to “Domains”
2. From the terminal
For each cPanel account there is a file “main” located in /var/cpanel/userdata/USERNAME that contains all account details, including domain names.
cat /var/cpanel/userdata/USERNAME/main