Your VPS will normally be allocated an rDNS address on the cymru1.org domain (e.g. ip247.cymru1.org).

However, for a small one-off fee per IP, you can specify your own custom rDNS address - potentially to match that of the master domain running on your VPS. (e.g. yourdomain.com)

Please see the Additional Details and FAQs page for more information