shell:$ nslookup -timeout=2 -retry=1 'doc.sard.ac'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	doc.sard.ac
Address: 172.67.165.58
Name:	doc.sard.ac
Address: 104.21.81.218
Name:	doc.sard.ac
Address: 2606:4700:3034::ac43:a53a
Name:	doc.sard.ac
Address: 2606:4700:3034::6815:51da