Robtex

Up: 54.239.28.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 54.239.29.0/25
Down right: 54.239.29.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
54.239.29.0	A	unagi-na.amazon.com
54.239.29.1	A	jeeves-widget-service.amazon.com
54.239.29.5	A	sb-website-returns-svc.amazon.com
54.239.29.8	A	ec2.amazonaws.com
54.239.29.9	A	thexba.net
54.239.29.13	A	support.us-east-1.amazonaws.com
54.239.29.17	A	jeeves-widget-service.amazon.com
54.239.29.26	A	cloudfront.amazonaws.com
54.239.29.30	A	warpspeed.us-east-1.aws.amazon.com
54.239.29.32	A	msh.amazon.com
54.239.29.34	A	alexa-calendar-notification-preview.amazon.com
54.239.29.35	A	smile.amazon.com
54.239.29.38	A	logistics.amazon.com.mx
54.239.29.42	A	payments-sandbox.amazon.com
54.239.29.45	A	www.gamesimdb.com
54.239.29.45	A	reviews.imdb.com
54.239.29.45	A	www.imdbonline.com
54.239.29.51	A	cloudfront.amazonaws.com
54.239.29.54	A	warpspeed.us-east-1.aws.amazon.com
54.239.29.63	A	tracker.amazonaws.com
54.239.29.64	A	warpspeed.us-east-1.aws.amazon.com
54.239.29.65	A	cloudfront.amazonaws.com
54.239.29.73	A	origin-www.audible.com
54.239.29.73	A	audible.com
54.239.29.73	A	www.audible.com
54.239.29.74	A	giveaway.amazon.com
54.239.29.97	A	codepipeline.us-east-1.amazonaws.com
54.239.29.98	A	cloudtrail.us-east-1.amazonaws.com
54.239.29.101	A	elastictranscoder.us-east-1.amazonaws.com
54.239.29.103	A	dynamodb-toolbox.aws.amazon.com
54.239.29.105	A	dynamodb-toolbox.aws.amazon.com
54.239.29.116	A	dynamodb-toolbox.aws.amazon.com
54.239.29.119	A	giraffe-core-gamma-1a.us-east-1.amazonaws.com
54.239.29.120	A	dynamodb-toolbox.aws.amazon.com
54.239.29.123	A	elasticbeanstalk-health.us-east-1.amazonaws.com
54.239.29.125	A	worker.mturk.com
54.239.29.128	A	api.amazon.com
54.239.29.133	A	origin-sellercentral.amazon.com.br
54.239.29.135	A	forums.aws.amazon.com
54.239.29.136	A	origin-sellercentral.amazon.com.br
54.239.29.137	A	annotation-mapping-proxy-na-preprod.amazon.com
54.239.29.138	A	adg-entitlement.amazon.com
54.239.29.141	A	novitas-service-dev.amazon.com
54.239.29.142	A	api.amazon.com
54.239.29.143	A	uitoolkit.amazon.com
54.239.29.147	A	origin-sellercentral.amazon.com.br
54.239.29.151	A	origin-api.amazonalexa.com
54.239.29.151	A	api.amazonalexa.com
54.239.29.158	A	worker.mturk.com
54.239.29.160	A	route53domains.us-east-1.amazonaws.com
54.239.29.163	A	worker.mturk.com
54.239.29.165	A	machinelearning.us-east-1.amazonaws.com
54.239.29.176	A	elasticloadbalancing.amazonaws.com
54.239.29.185	A	arap.amazon.ca
54.239.29.186	A	arap.amazon.com
54.239.29.191	A	alexa-calendar-notification-preview.amazon.com
54.239.29.193	A	restaurants.amazon.com
54.239.29.194	A	origin-api.amazonalexa.com
54.239.29.194	A	api.amazonalexa.com
54.239.29.197	A	switchyard-na-preprod.amazon.com
54.239.29.199	A	todo-g7g.amazon.com
54.239.29.204	A	origin-music.amazon.com
54.239.29.204	A	opf-music.amazon.com
54.239.29.205	A	ams.amazon.ca
54.239.29.206	A	payments-na.amazon.com
54.239.29.209	A	cde-g7g-preprod.amazon.com
54.239.29.212	A	forums.aws.amazon.com
54.239.29.213	A	switchyard-na-preprod.amazon.com
54.239.29.215	A	sonos-na.amazon.com
54.239.29.224	A	forums.aws.amazon.com
54.239.29.227	A	todo-g7g.amazon.com
54.239.29.228	A	trials-na.amazon.com
54.239.29.232	A	todo-g7g.amazon.com
54.239.29.233	A	ktpx.amazon.com
54.239.29.239	A	logistics.amazon.com.mx
54.239.29.249	A	rds.us-east-1.amazonaws.com