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

Non-authoritative answer:
Name:	isat.novan.hostnovan-store.duolingo.com
Address: 50.19.115.131
Name:	isat.novan.hostnovan-store.duolingo.com
Address: 54.80.108.190