Normally, the Name Servers for a particular DNS zone could be retrieved from the DNS Management console that comes as a part of Administrative tools in Windows servers. But, there are times when an administrator sitting at a desktop would want to quickly identify what other Name Servers are available for that particular zone. Unfortunately, we cannot have Administrative Tools installed on all the desktops in the network.

To quickly retrieve the list of Name Servers for your DNS zone from any Windows machine that is part of the domain;

Open a command prompt
Type nslookup
Set the query type to NS record with the following command and hit enter.
Set querytype=NS
Enter the FQDN of the DNS domain and hit enter
example.com

This should give us the list of Name Servers for example.com along with their IP addresses.