shell:$ nslookup -timeout=2 -retry=1 'a.root-servers.net'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	a.root-servers.net
Address: 198.41.0.4
Name:	a.root-servers.net
Address: 2001:503:ba3e::2:30