Robtex

Up: 72.21.214.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 72.21.214.0/25
Down right: 72.21.214.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
72.21.214.2	A	cdn-i.dd.imdb.com
72.21.214.2	A	images.dd.imdb.com
72.21.214.2	A	images.imdb.com
72.21.214.3	A	imbd-professional.com
72.21.214.3	A	proimdb.info
72.21.214.3	A	proimbd.com
72.21.214.4	A	agora.amazon.com
72.21.214.6	A	wms.assoc-amazon.ca
72.21.214.11	A+PTR	target-preview.amazonpmi.com
72.21.214.13	A	app.dd.imdb.com
72.21.214.18	A+PTR	ostatic-na.payments-amazon.com
72.21.214.21	PTR	alami-source-request.amazonaws.com
72.21.214.25	A+PTR	dns.amazonaws.com
72.21.214.32	A	autoscaling.amazonaws.com
72.21.214.32	A	autoscaling.us-east-1.amazonaws.com
72.21.214.51	PTR	amazonses.com
72.21.214.51	A	email-bounces.amazonses.com
72.21.214.51	A	www.amazonses.com
72.21.214.52	A	mas-ext.amazon.com
72.21.214.64	A	pro-labs.imdb.com
72.21.214.67	A	pmirrp.signin.aws.amazon.com
72.21.214.67	A	vp-agence.signin.aws.amazon.com
72.21.214.67	A	lawson.signin.aws.amazon.com
72.21.214.71	A	zme-caps.amazon.com
72.21.214.72	A	zme-cals.amazon.com
72.21.214.74	A	pda-as.amazon.com
72.21.214.80	A	orizaba.amazon.com
72.21.214.81	A	roamful.com
72.21.214.81	A	ferngineering.com
72.21.214.81	A	dadamo.org
72.21.214.82	A	roamful.com
72.21.214.83	A	www.mturk.com
72.21.214.84	A	mechanicalturk.amazonaws.com
72.21.214.87	PTR	email.us-east-1.amazonaws.com
72.21.214.88	PTR	email-verification.us-east-1.amazonaws.com
72.21.214.89	A+PTR	smtp-in.amazonses.com
72.21.214.90	A+PTR	smtp-in.amazonaws.com
72.21.214.96	A	ics.createspace.com
72.21.214.100	A	cortana-gateway-gamma.amazon.com
72.21.214.141	PTR	s3-website-us-east-1.amazonaws.com
72.21.214.141	A	www.panomonkey.com
72.21.214.141	A	isbelalugosidead.com
72.21.214.142	PTR	s3-console-us-standard.amazonaws.com
72.21.214.143	PTR	s3-1.amazonaws.com
72.21.214.144	PTR	s3-1-w.amazonaws.com
72.21.214.144	A	image.buyma.com.s3.amazonaws.com
72.21.214.144	A	azoreband.com
72.21.214.145	PTR	s3-external-1.amazonaws.com
72.21.214.153	PTR	s3-console-us-standard.amazonaws.com
72.21.214.154	PTR	s3-1.amazonaws.com
72.21.214.155	PTR	s3-1-w.amazonaws.com
72.21.214.156	PTR	s3-external-1.amazonaws.com
72.21.214.157	PTR	s3-website-us-east-1.amazonaws.com
72.21.214.157	A	weatherfunapp.com
72.21.214.157	A	avagina.us
72.21.214.159	PTR	s3-1.amazonaws.com
72.21.214.160	PTR	s3-1-w.amazonaws.com
72.21.214.160	A	marglyph.s3.amazonaws.com
72.21.214.160	A	unmultimedia.org.s3.amazonaws.com
72.21.214.161	PTR	s3-external-1.amazonaws.com
72.21.214.164	A+PTR	tracker.amazonaws.com
72.21.214.197	PTR	s3-website-us-east-1.amazonaws.com
72.21.214.197	A	xn-----6kcbbcvdfaxjgb2af3acfht8bvz0a6y.xn--p1ai
72.21.214.197	A	athenastudios.com
72.21.214.199	PTR	s3-1.amazonaws.com
72.21.214.200	PTR	s3-1-w.amazonaws.com
72.21.214.200	A	*.eu.s3.amazonaws.com
72.21.214.200	A	s3-2-w.amazonaws.com
72.21.214.201	PTR	s3-external-1.amazonaws.com