Its always tough to figure out what’s happening to your domains when you register them, set the Name Servers and… well nothing happens.
So you do this:
1) Download DNSDataView and run it
2) Write in your Domain name and your expected DOMAIN NAME SERVER
3) Click OK and if you get something to show (like below), then you can put these names as the primary and secondary name servers for your domain! (ping the servers to get the IPs if needed). If not try another server in the list.
The usual nameservers for me were:
ns14.domaincontrol.com
ns15.domaincontrol.com
ns25.domaincontrol.com
ns26.domaincontrol.com
ns48.domaincontrol.com
ns49.domaincontrol.com
ns50.domaincontrol.com
ns51.domaincontrol.com