shell:$ nslookup -timeout=2 -retry=1 'c15117557.ssl.cf2.rackcdn.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
c15117557.ssl.cf2.rackcdn.com	canonical name = cf2.rackcdn.com.edgekey.net.
cf2.rackcdn.com.edgekey.net	canonical name = e4847.g.akamaiedge.net.
Name:	e4847.g.akamaiedge.net
Address: 23.198.78.90