shell:$ nslookup -timeout=2 -retry=1 'portal.edx.org'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
portal.edx.org	canonical name = portal.edx.org.cdn.cloudflare.net.
Name:	portal.edx.org.cdn.cloudflare.net
Address: 104.16.189.80
Name:	portal.edx.org.cdn.cloudflare.net
Address: 104.16.190.80
Name:	portal.edx.org.cdn.cloudflare.net
Address: 104.16.191.80
Name:	portal.edx.org.cdn.cloudflare.net
Address: 104.16.192.80
Name:	portal.edx.org.cdn.cloudflare.net
Address: 104.16.193.80
Name:	portal.edx.org.cdn.cloudflare.net
Address: 2606:4700::6810:bd50
Name:	portal.edx.org.cdn.cloudflare.net
Address: 2606:4700::6810:be50
Name:	portal.edx.org.cdn.cloudflare.net
Address: 2606:4700::6810:bf50
Name:	portal.edx.org.cdn.cloudflare.net
Address: 2606:4700::6810:c050
Name:	portal.edx.org.cdn.cloudflare.net
Address: 2606:4700::6810:c150