Robtex

Up: 54.182.224.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 54.182.228.0/23
Down right: 54.182.230.0/23

IP	Type	Hostname
54.182.230.3	PTR	server-54-182-230-3.iad16.r.cloudfront.net
54.182.230.5	PTR	server-54-182-230-5.iad16.r.cloudfront.net
54.182.230.8	A+PTR	server-54-182-230-8.iad16.r.cloudfront.net
54.182.230.10	PTR	server-54-182-230-10.iad16.r.cloudfront.net
54.182.230.19	A+PTR	server-54-182-230-19.iad16.r.cloudfront.net
54.182.230.42	A	server-54-182-230-42.iad16.r.cloudfront.net
54.182.230.43	PTR	server-54-182-230-43.iad16.r.cloudfront.net
54.182.230.44	A+PTR	server-54-182-230-44.iad16.r.cloudfront.net
54.182.230.46	A+PTR	server-54-182-230-46.iad16.r.cloudfront.net
54.182.230.49	A+PTR	server-54-182-230-49.iad16.r.cloudfront.net
54.182.230.51	A+PTR	server-54-182-230-51.iad16.r.cloudfront.net
54.182.230.53	A+PTR	server-54-182-230-53.iad16.r.cloudfront.net
54.182.230.54	A+PTR	server-54-182-230-54.iad16.r.cloudfront.net
54.182.230.56	A+PTR	server-54-182-230-56.iad16.r.cloudfront.net
54.182.230.59	PTR	server-54-182-230-59.iad16.r.cloudfront.net
54.182.230.61	PTR	server-54-182-230-61.iad16.r.cloudfront.net
54.182.230.65	PTR	server-54-182-230-65.iad16.r.cloudfront.net
54.182.230.68	A+PTR	server-54-182-230-68.iad16.r.cloudfront.net
54.182.230.70	A+PTR	server-54-182-230-70.iad16.r.cloudfront.net
54.182.230.72	A+PTR	server-54-182-230-72.iad16.r.cloudfront.net
54.182.230.96	A+PTR	server-54-182-230-96.iad16.r.cloudfront.net
54.182.230.97	PTR	server-54-182-230-97.iad16.r.cloudfront.net