All of our Cloud and reseller services use the same DNS cluster and the nameservers you should use for any of these services are as follows:
Cloud accounts:
ns1.mddservices.com
ns2.mddservices.com
ns3.mddservices.com
Should you need the IP addresses for our nameservers:
ns1 - 173.248.187.10
ns2 - 173.248.191.11
ns3 - 173.248.188.12