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: 52.205.12.243
Name:	www.duolingo.com
Address: 34.207.52.142
Name:	www.duolingo.com
Address: 3.215.20.162
Name:	www.duolingo.com
Address: 100.28.4.63
Name:	www.duolingo.com
Address: 100.51.196.113
Name:	www.duolingo.com
Address: 54.152.172.109
Name:	www.duolingo.com
Address: 54.83.57.216
Name:	www.duolingo.com
Address: 54.92.184.83