In ClouDNS, you can add a free DNS zone with free hostname. You can choose from a list of domains. The records for the Free Zone can be managed from the ClouDNS web interface.
How to add Free Zone in ClouDNS?
Login in your account, click on the DNS zones [Add new] link, click on the Free zone box, enter the domain name you wish to use for your free zone, choose one of the domains in the list and click on "Register".