What are your DNS servers names and addresses?

DNS
If depends upon what Control Panel you are using.
 
Using HELM Control Panel
ns1.nsnetwork.net (82.113.135.39)
ns2.nsnetwork.net (82.113.137.132)
ns3.nsnetwork.net (82.113.143.21)
 
Using WebSitePanel Control Panel
ns1.rackdns.net (82.113.135.44)
ns2.rackdns.net (82.113.143.89)
ns3.rackdns.net (82.113.137.133)