$ dig @8.8.8.8 ns +short pornhub.com ns2.p44.dynect.net. ns3.p44.dynect.net. ns4.p44.dynect.net. sdns3.ultradns.net. sdns3.ultradns.com. sdns3.ultradns.org. sdns3.ultradns.biz. ns1.p44.dynect.net.
C:\>nslookup > set type=ns > amazon.com Non-authoritative answer: amazon.com nameserver = ns3.p31.dynect.net amazon.com nameserver = pdns1.ultradns.net amazon.com nameserver = ns4.p31.dynect.net amazon.com nameserver = pdns6.ultradns.co.uk amazon.com nameserver = ns1.p31.dynect.net amazon.com nameserver = ns2.p31.dynect.net