@casino It’s not possible to list all subdomains of jezebel.com, because they can add or remove subdomains any time. What you can do is list jezebel.com first and see if the site you tried to visit is blocked. If not, add those (sub)domains to your list.
It’s a lot easier to block the domains on the router – you don’t need to worry about subdomains. Just add “jezebel.com” to the blocked list and you are covered for all subdomains also.