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

Non-authoritative answer:
Name:	www.duosecurity.com
Address: 13.32.164.86
Name:	www.duosecurity.com
Address: 13.32.164.81
Name:	www.duosecurity.com
Address: 13.32.164.74
Name:	www.duosecurity.com
Address: 13.32.164.108