Robtex

Up: 54.239.22.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 54.239.23.0/25
Down right: 54.239.23.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
54.239.23.3	A	alexa-calendar-notification-prod.amazon.com
54.239.23.4	A	otsms-na-master-extern.amazon.com
54.239.23.6	A	zapposcouture.amazon.com
54.239.23.16	A	zapposcouture.amazon.com
54.239.23.20	A	sha256.webservices.amazon.com
54.239.23.34	A	zappos-latest-client-authenticated.amazon.com
54.239.23.37	A	couture-client-authenticated.amazon.com
54.239.23.40	A	couture-client-authenticated.amazon.com
54.239.23.41	A	zappos-latest-client-authenticated.amazon.com
54.239.23.44	A	outback-mx-gamma-ext.amazon.com
54.239.23.53	A	zappos-latest-client-authenticated.amazon.com
54.239.23.59	A	syncdelivery.audible.com
54.239.23.68	A	couture-latest-client-authenticated.amazon.com
54.239.23.73	A	icq.imdb.com
54.239.23.73	A	www.imdb.me
54.239.23.73	A	www.imdb.com.br
54.239.23.83	A	amazonlivetools-integ-prod.amazon.com
54.239.23.87	A	paifas.amazon.com
54.239.23.88	A	horizonte.browserapps.amazon.com
54.239.23.88	A	horizonte.browserapps.amazon.ca
54.239.23.94	A	mobileanalytics.us-east-1.amazonaws.com
54.239.23.97	A	couture-latest-client-authenticated.amazon.com
54.239.23.111	A	travel.amazon.com
54.239.23.114	A	paragon-na.amazon.com
54.239.23.136	A	opf-sellercentral.amazon.ca
54.239.23.136	A	origin-sellercentral.amazon.ca
54.239.23.141	A	ads.amazon.com
54.239.23.159	A	wireless.amazon.com
54.239.23.164	A	storywriter.amazon.com
54.239.23.167	A	wireless.amazon.com
54.239.23.226	A	origin-read.amazon.com
54.239.23.242	A	applab-sdk.amazon.com
54.239.23.243	A	bob-dispatch-migration-na.amazon.com
54.239.23.243	A	avs-alexa-na.amazon.com