shell:$ nslookup -timeout=2 -retry=1 'www.sharepointonline.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
www.sharepointonline.com	canonical name = sharepointonline.com.
Name:	sharepointonline.com
Address: 65.55.93.60