Robtex

Up: 54.239.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 54.239.21.0/25
Down right: 54.239.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
54.239.21.2	A	nom-mgmt.amazon.com
54.239.21.19	A	dyk-ext-na.amazon.com
54.239.21.20	A	vcc-onboarding.amazon.com
54.239.21.24	A	boxofficemojo.com
54.239.21.24	A	www.boxofficemojo.com
54.239.21.25	A	rio-mobile-ingress.amazon.com
54.239.21.26	A	frat-na-external.amazon.com
54.239.21.27	A+PTR	amz.onl
54.239.21.27	A	a.co
54.239.21.29	A	6pm-latest-client-authenticated.amazon.com
54.239.21.54	A	cloud9-bimp-us-east-1-prod.amazon.com
54.239.21.64	A	atv-ext-sha256.amazon.com
54.239.21.67	A	opf-www.amazon.com.mx
54.239.21.68	A	twitch.amazon.com
54.239.21.69	A	firs-ta-g7g.amazon.com
54.239.21.80	A	m.shopbop.com
54.239.21.82	A	origin-advertising.amazon.com
54.239.21.85	A	services.amazon.com.mx
54.239.21.86	A	omwees-na-extern.amazon.com
54.239.21.87	A	advertising-api.amazon.com
54.239.21.120	A	oss-na-master-extern.amazon.com
54.239.21.121	A	logistics-platform-preprod.amazon.com
54.239.21.122	A	sif-tams-gamma.amazon.com
54.239.21.123	A	www.withoutabox.com
54.239.21.123	A	withoutabox.com
54.239.21.124	A	logistics-platform.amazon.com
54.239.21.125	A	feed.browserapps.amazon.ca
54.239.21.125	A	storage.browserapps.amazon.ca
54.239.21.125	A	dossier.browserapps.amazon.com
54.239.21.134	A	sif-tams-gamma.amazon.com
54.239.21.138	A	logistics-platform.amazon.com
54.239.21.139	A	feed.browserapps.amazon.com
54.239.21.139	A	titan.app.amazonbrowserapp.ca
54.239.21.139	A	identity.browserapps.amazon.com
54.239.21.140	A	dv-manifest-service-na-prod.amazon.com
54.239.21.154	A	alexa-setup.amazon.com
54.239.21.157	A	bob-dispatch-migration-na.amazon.com
54.239.21.157	A	latinum.amazon.com
54.239.21.184	A	securephotostorageservice-na-external.amazon.com
54.239.21.192	A	securephotostorageservice-na-external.amazon.com
54.239.21.193	A	larynx-svc-na.amazon.com
54.239.21.195	A	omwees-na-extern.amazon.com
54.239.21.227	A	es.us-east-1.amazonaws.com
54.239.21.229	A	tax.audible.com
54.239.21.236	A	api-preprod.amazon.com
54.239.21.249	A	www.withoutabox.com
54.239.21.249	A	withoutabox.com