To query a specific nameserver with the nslookup util execute it as follows:
$ nslookup - 8.8.8.8
> d0m.me
Server: 8.8.8.8
Address: 8.8.8.8#53
Non-authoritative answer:
Name: d0m.me
Address: 83.141.17.10
> exit
In this example I query the Google Nameserver (8.8.8.8) for my own domain d0m.me.
The nameserver could be specified as IP address or fqdn.