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

Non-authoritative answer:
Name:	duolingo.com
Address: 54.235.119.103
Name:	duolingo.com
Address: 50.19.197.199
Name:	duolingo.com
Address: 107.23.232.61