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

Non-authoritative answer:
Name:	doi.org
Address: 104.26.5.132
Name:	doi.org
Address: 104.26.4.132
Name:	doi.org
Address: 172.67.69.3
Name:	doi.org
Address: 2606:4700:20::ac43:4503
Name:	doi.org
Address: 2606:4700:20::681a:484
Name:	doi.org
Address: 2606:4700:20::681a:584