shell:$ nslookup -timeout=2 -retry=1 'englishtest-stage100.duolingo.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	englishtest-stage100.duolingo.com
Address: 52.22.249.102
Name:	englishtest-stage100.duolingo.com
Address: 100.29.244.54
Name:	englishtest-stage100.duolingo.com
Address: 44.208.78.191