Robtex

Up: 52.84.20.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 52.84.20.0/26
Down right: 52.84.20.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
52.84.20.6	A+PTR	server-52-84-20-6.sea32.r.cloudfront.net
52.84.20.6	A	realtime.taggstar.com
52.84.20.8	PTR	server-52-84-20-8.sea32.r.cloudfront.net
52.84.20.15	PTR	server-52-84-20-15.ord53.r.cloudfront.net
52.84.20.15	A	d1ptlxm22zm52q.cloudfront.net
52.84.20.16	A+PTR	server-52-84-20-16.sea32.r.cloudfront.net
52.84.20.16	A	static-assets.strikinglycdn.com
52.84.20.21	A+PTR	server-52-84-20-21.sea32.r.cloudfront.net
52.84.20.21	A	kmu-cs-web-client-171.slack.com
52.84.20.21	A	yangchenliang.slack.com
52.84.20.24	A	d11rmv9we9fli4.cloudfront.net
52.84.20.25	A+PTR	server-52-84-20-25.sea32.r.cloudfront.net
52.84.20.25	A	d17rjhgarjba2p.cloudfront.net
52.84.20.27	A	sandestawebdesign.com
52.84.20.28	A+PTR	server-52-84-20-28.sea32.r.cloudfront.net
52.84.20.28	A	win-help-705.s3-accelerate.amazonaws.com
52.84.20.31	PTR	server-52-84-20-31.sea32.r.cloudfront.net
52.84.20.32	A+PTR	server-52-84-20-32.sea32.r.cloudfront.net
52.84.20.34	A+PTR	server-52-84-20-34.sea32.r.cloudfront.net
52.84.20.34	A	evident.io
52.84.20.43	A+PTR	server-52-84-20-43.sea32.r.cloudfront.net
52.84.20.43	A	insight-portal-resources.s3-accelerate.amazonaws.com
52.84.20.43	A	upload-tutelawest.s3-accelerate.amazonaws.com
52.84.20.48	PTR	server-52-84-20-48.sea32.r.cloudfront.net
52.84.20.51	PTR	server-52-84-20-51.ord53.r.cloudfront.net
52.84.20.53	A+PTR	server-52-84-20-53.sea32.r.cloudfront.net
52.84.20.53	A	d1bb9wkjnojqtk.cloudfront.net
52.84.20.53	A	d3tklly2jaaa46.cloudfront.net
52.84.20.56	A+PTR	server-52-84-20-56.ord53.r.cloudfront.net
52.84.20.56	A	server-52-84-20-56.sea32.r.cloudfront.net
52.84.20.57	PTR	server-52-84-20-57.ord53.r.cloudfront.net
52.84.20.57	A	server-52-84-20-57.sea32.r.cloudfront.net
52.84.20.57	A	d1toqebtjghbs5.cloudfront.net
52.84.20.58	A+PTR	server-52-84-20-58.sea32.r.cloudfront.net
52.84.20.58	A	d1u7a775n349fx.cloudfront.net
52.84.20.58	A	channels-uploads.gopro.com
52.84.20.62	A	d2uddx65zypk1k.cloudfront.net
52.84.20.63	PTR	server-52-84-20-63.ord53.r.cloudfront.net
52.84.20.63	A	win-help-121.s3-accelerate.amazonaws.com
52.84.20.63	A	win-ayuda-112.s3-accelerate.amazonaws.com
52.84.20.64	PTR	server-52-84-20-64.ord53.r.cloudfront.net
52.84.20.64	A	server-52-84-20-64.sea32.r.cloudfront.net
52.84.20.65	A+PTR	server-52-84-20-65.sea32.r.cloudfront.net
52.84.20.65	A	win-help-915.s3-accelerate.amazonaws.com
52.84.20.65	A	win-help-812.s3-accelerate.amazonaws.com
52.84.20.66	A	wwbcit.slack.com
52.84.20.66	A	bluebastardsteam.slack.com
52.84.20.66	A	dbpedia.slack.com
52.84.20.67	A	ncgm.s3-accelerate.amazonaws.com
52.84.20.77	A+PTR	server-52-84-20-77.sea32.r.cloudfront.net
52.84.20.79	A	cadenceco.slack.com
52.84.20.79	A	gustohq.slack.com
52.84.20.79	A	tututestgroup.slack.com
52.84.20.80	A+PTR	server-52-84-20-80.sea32.r.cloudfront.net
52.84.20.80	A	d2x3xm1hznff8u.cloudfront.net
52.84.20.82	A	d37gsmzxtsj9zn.cloudfront.net
52.84.20.84	A+PTR	server-52-84-20-84.sea32.r.cloudfront.net
52.84.20.84	A	d2cp8qnlnrfxq4.cloudfront.net
52.84.20.86	A	soda1.midasplayer.com
52.84.20.87	A	oneworldidentity.slack.com
52.84.20.87	A	nugu-team.slack.com
52.84.20.87	A	skn-clbi.slack.com
52.84.20.92	A	nbnitreleasemgmt.slack.com
52.84.20.92	A	remotehorror.slack.com
52.84.20.92	A	cm2000.slack.com
52.84.20.95	A+PTR	server-52-84-20-95.ord53.r.cloudfront.net
52.84.20.98	A+PTR	server-52-84-20-98.sea32.r.cloudfront.net
52.84.20.99	A+PTR	server-52-84-20-99.sea32.r.cloudfront.net
52.84.20.99	A	hs.interpolls.com
52.84.20.100	A	eylj.org
52.84.20.101	A	perficient.slack.com
52.84.20.101	A	whopsec.slack.com
52.84.20.101	A	vinelab.slack.com
52.84.20.112	A	bloomz-files-va.s3-accelerate.amazonaws.com
52.84.20.112	A	win-help10.s3-accelerate.amazonaws.com
52.84.20.112	A	ncgm-log.s3-accelerate.amazonaws.com
52.84.20.119	PTR	server-52-84-20-119.sea32.r.cloudfront.net
52.84.20.119	A	davbarimages.smugmug.com
52.84.20.119	A	lindsi.smugmug.com
52.84.20.120	PTR	server-52-84-20-120.sea32.r.cloudfront.net
52.84.20.120	A	glpagenergiech.slack.com
52.84.20.120	A	rabobank-rfs.slack.com
52.84.20.121	A+PTR	server-52-84-20-121.sea32.r.cloudfront.net
52.84.20.121	A	biol2110.slack.com
52.84.20.121	A	welton.slack.com
52.84.20.122	A+PTR	server-52-84-20-122.sea32.r.cloudfront.net
52.84.20.124	A+PTR	server-52-84-20-124.sea32.r.cloudfront.net
52.84.20.124	A	win-ayuda-703.s3-accelerate.amazonaws.com