Robtex

Up: 54.192.20.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 54.192.20.128/26
Down right: 54.192.20.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
54.192.20.167	A+PTR	server-54-192-20-167.ewr2.r.cloudfront.net
54.192.20.168	PTR	server-54-192-20-168.ewr2.r.cloudfront.net
54.192.20.169	PTR	server-54-192-20-169.dfw54.r.cloudfront.net
54.192.20.169	A	server-54-192-20-169.ewr2.r.cloudfront.net
54.192.20.169	A	d1u2cbczpt82kt.ewr2.cloudfront.net
54.192.20.236	PTR	server-54-192-20-236.hkg62.r.cloudfront.net
54.192.20.236	A	server-54-192-20-236.ewr2.r.cloudfront.net
54.192.20.243	A+PTR	server-54-192-20-243.ewr2.r.cloudfront.net
54.192.20.243	A	d1u2cbczpt82kt.ewr2.cloudfront.net
54.192.20.243	A	ads.a.playnomics.net