Robtex

Up: 72.21.215.128/25
Can't show all results, try to descend to a more specific CIDR
Down left: 72.21.215.128/27
Down right: 72.21.215.160/27
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.21.215.131	A	payments.amazon.com
72.21.215.132	PTR	s3-1.amazonaws.com
72.21.215.133	PTR	s3-1-w.amazonaws.com
72.21.215.134	PTR	s3-external-1.amazonaws.com
72.21.215.135	PTR	s3-console-us-standard.console.aws.amazon.com
72.21.215.136	PTR	s3-console-us-standard.amazonaws.com
72.21.215.137	PTR	seeder.amazonaws.com
72.21.215.138	PTR	tracker.amazonaws.com
72.21.215.139	PTR	s3-website-us-east-1.amazonaws.com
72.21.215.139	A	sg.perion.com
72.21.215.139	A	softwareplus.ro
72.21.215.140	PTR	anon-cp.storagegateway.us-east-1.amazonaws.com
72.21.215.141	PTR	client-cp.storagegateway.us-east-1.amazonaws.com
72.21.215.142	PTR	dp-1.storagegateway.us-east-1.amazonaws.com
72.21.215.144	PTR	proxy-app.storagegateway.us-east-1.amazonaws.com
72.21.215.145	PTR	sg-console-us-standard.console.aws.amazon.com
72.21.215.147	A	www.assoc-amazon.com
72.21.215.148	A	a4k.amazon.com
72.21.215.151	A	whispercast.amazon.com
72.21.215.152	A	lbr-optimized.console-l.amazonaws.com
72.21.215.152	A	us-east-1.console.aws.amazon.com
72.21.215.158	A	mturk-requester.us-east-1.amazonaws.com
72.21.215.159	A	sesblog.amazon.com
72.21.215.160	A	mturk-requester-sandbox.us-east-1.amazonaws.com
72.21.215.164	PTR	s3-1.amazonaws.com
72.21.215.165	PTR	s3-1-w.amazonaws.com
72.21.215.165	A	assets-hellobar-com.s3.amazonaws.com
72.21.215.165	A	htmlads.s3.amazonaws.com
72.21.215.166	PTR	s3-external-1.amazonaws.com
72.21.215.167	PTR	s3-console-us-standard.console.aws.amazon.com
72.21.215.168	PTR	s3-console-us-standard.amazonaws.com
72.21.215.169	PTR	seeder.amazonaws.com
72.21.215.170	PTR	tracker.amazonaws.com
72.21.215.171	PTR	s3-website-us-east-1.amazonaws.com
72.21.215.171	A	blueskyandcloudydays.com
72.21.215.173	PTR	client-cp.storagegateway.us-east-1.amazonaws.com
72.21.215.174	PTR	dp-1.storagegateway.us-east-1.amazonaws.com
72.21.215.175	PTR	config.storagegateway.us-east-1.amazonaws.com
72.21.215.176	PTR	proxy-app.storagegateway.us-east-1.amazonaws.com
72.21.215.177	PTR	sg-console-us-standard.console.aws.amazon.com
72.21.215.179	A	mechanicalturk.sandbox.amazonaws.com
72.21.215.181	A	www.amazonb2b.com
72.21.215.187	A	amarillo.amazon.com
72.21.215.188	A	storeadmin.amazon.com