Robtex

Up: 72.21.215.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 72.21.215.0/26
Down right: 72.21.215.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.21.215.1	PTR	client-cp.storagegateway.us-east-1.amazonaws.com
72.21.215.2	PTR	anon-cp.storagegateway.us-east-1.amazonaws.com
72.21.215.3	PTR	dp-1.storagegateway.us-east-1.amazonaws.com
72.21.215.4	PTR	config.storagegateway.us-east-1.amazonaws.com
72.21.215.5	PTR	proxy-app.storagegateway.us-east-1.amazonaws.com
72.21.215.22	A	ams.amazon.com
72.21.215.28	A	harbor.amazon.com
72.21.215.50	A	fals.atv-ps.amazon.com
72.21.215.52	A	www.imdb.net
72.21.215.52	A	www.proimdb.com
72.21.215.52	A	www.imdb.me
72.21.215.55	A+PTR	appstream-alpha.us-east-1.amazonaws.com
72.21.215.61	A	workersandbox.mturk.com
72.21.215.65	A	stcds.audible.com
72.21.215.66	A	sms-in.amazon.com
72.21.215.74	A	retail-smtp-in.amazon.com
72.21.215.75	PTR	s3-1.amazonaws.com
72.21.215.76	PTR	s3-1-w.amazonaws.com
72.21.215.76	A	yousaidit.com.s3.amazonaws.com
72.21.215.76	A	slideshare-audio.s3.amazonaws.com
72.21.215.77	PTR	s3-external-1.amazonaws.com
72.21.215.78	PTR	s3-console-us-standard.console.aws.amazon.com
72.21.215.79	PTR	s3-console-us-standard.amazonaws.com
72.21.215.80	PTR	seeder.amazonaws.com
72.21.215.81	PTR	tracker.amazonaws.com
72.21.215.82	PTR	s3-website-us-east-1.amazonaws.com
72.21.215.82	A	youriding.com.s3-website-us-east-1.amazonaws.com
72.21.215.82	A	alexandteagueareawesome.com
72.21.215.83	PTR	anon-cp.storagegateway.us-east-1.amazonaws.com
72.21.215.84	PTR	client-cp.storagegateway.us-east-1.amazonaws.com
72.21.215.85	PTR	dp-1.storagegateway.us-east-1.amazonaws.com
72.21.215.86	PTR	config.storagegateway.us-east-1.amazonaws.com
72.21.215.87	PTR	proxy-app.storagegateway.us-east-1.amazonaws.com
72.21.215.89	PTR	s3-1.amazonaws.com
72.21.215.89	A	s3-2.amazonaws.com
72.21.215.90	PTR	s3-1-w.amazonaws.com
72.21.215.91	PTR	s3-external-1.amazonaws.com
72.21.215.92	A+PTR	s3-console-us-standard.console.aws.amazon.com
72.21.215.93	PTR	s3-console-us-standard.amazonaws.com
72.21.215.94	PTR	seeder.amazonaws.com
72.21.215.95	PTR	tracker.amazonaws.com
72.21.215.96	PTR	s3-website-us-east-1.amazonaws.com
72.21.215.96	A	graddecisions.com
72.21.215.96	A	graddecisions.org
72.21.215.97	PTR	glacier.us-east-1.amazonaws.com
72.21.215.98	PTR	client-cp.storagegateway.us-east-1.amazonaws.com
72.21.215.99	PTR	dp-1.storagegateway.us-east-1.amazonaws.com
72.21.215.100	PTR	s3-1.amazonaws.com
72.21.215.101	PTR	s3-1-w.amazonaws.com
72.21.215.101	A	chefinyou.members.member-recipes.s3.amazonaws.com
72.21.215.101	A	mmrdata.com.s3.amazonaws.com
72.21.215.102	PTR	s3-external-1.amazonaws.com
72.21.215.103	PTR	s3-console-us-standard.console.aws.amazon.com
72.21.215.104	PTR	s3-console-us-standard.amazonaws.com
72.21.215.105	PTR	seeder.amazonaws.com
72.21.215.106	PTR	tracker.amazonaws.com
72.21.215.107	PTR	s3-website-us-east-1.amazonaws.com
72.21.215.107	A	studiothirtynine.com
72.21.215.107	A	planwander.com
72.21.215.109	PTR	client-cp.storagegateway.us-east-1.amazonaws.com
72.21.215.110	PTR	dp-1.storagegateway.us-east-1.amazonaws.com
72.21.215.111	A+PTR	gamma.storagegateway.us-east-1.amazonaws.com
72.21.215.112	PTR	proxy-app.storagegateway.us-east-1.amazonaws.com
72.21.215.113	PTR	sg-console-us-standard.console.aws.amazon.com
72.21.215.114	PTR	config.storagegateway.us-east-1.amazonaws.com
72.21.215.115	PTR	proxy-app.storagegateway.us-east-1.amazonaws.com
72.21.215.116	A	kindle-periodicals-cs-sandbox.amazon.com
72.21.215.117	PTR	sg-console-us-standard.console.aws.amazon.com
72.21.215.118	A	amazonsupply.com
72.21.215.118	A	www.amazonsupply.com