shell:$ nslookup -timeout=2 -retry=1 'server-3-168-203-91.cgk51.r.cloudfront.net'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
Name:	server-3-168-203-91.cgk51.r.cloudfront.net
Address: 3.168.203.91