shell:$ nslookup -timeout=2 -retry=1 'www.duolingo.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	www.duolingo.com
Address: 34.226.177.172
Name:	www.duolingo.com
Address: 52.21.17.253
Name:	www.duolingo.com
Address: 18.235.237.148
Name:	www.duolingo.com
Address: 54.88.65.7
Name:	www.duolingo.com
Address: 50.17.155.208
Name:	www.duolingo.com
Address: 3.215.20.162
Name:	www.duolingo.com
Address: 98.90.26.31
Name:	www.duolingo.com
Address: 34.197.130.53