shell:$ nslookup -timeout=2 -retry=1 'www.duolingo.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
Name:	www.duolingo.com
Address: 3.224.44.154
Name:	www.duolingo.com
Address: 98.95.116.26
Name:	www.duolingo.com
Address: 54.83.235.138
Name:	www.duolingo.com
Address: 23.21.252.48
Name:	www.duolingo.com
Address: 54.80.30.68
Name:	www.duolingo.com
Address: 52.72.18.23
Name:	www.duolingo.com
Address: 3.209.54.24
Name:	www.duolingo.com
Address: 3.222.16.196