XO Communications rDNS

[Jeroen van Aart <jeroen () mompl net>]

I manage some IP space that's provided by an ISP but is "owned" by XO. I 
am trying to have rDNS configured but their contact email 
(ipadmin () eng xo com) in the whois does not grace me with a response (yet).

Does anyone know if there is a way to get this done or should I just not 
bother and live with it?

Thanks,
Jeroen