Robtex

Up: 52.85.80.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 52.85.81.0/25
Down right: 52.85.81.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
52.85.81.7	A	acronis-marketing.slack.com
52.85.81.7	A	napoleonx.slack.com
52.85.81.7	A	tahakom.slack.com
52.85.81.8	A+PTR	server-52-85-81-8.lax3.r.cloudfront.net
52.85.81.8	A	zt.1rx.io
52.85.81.12	PTR	server-52-85-81-12.lax3.r.cloudfront.net
52.85.81.32	A	d2yta8qzcmjtpn.cloudfront.net
52.85.81.36	PTR	server-52-85-81-36.lax3.r.cloudfront.net
52.85.81.40	A+PTR	server-52-85-81-40.lax3.r.cloudfront.net
52.85.81.44	A	xancraven.smugmug.com
52.85.81.44	A	chrismclennan.smugmug.com
52.85.81.44	A	sunrealtync.smugmug.com
52.85.81.47	A	athletephotos.smugmug.com
52.85.81.55	A	d65xh5bqinov4.cloudfront.net
52.85.81.66	A+PTR	server-52-85-81-66.lax3.r.cloudfront.net
52.85.81.66	A	creditscore.com
52.85.81.68	A+PTR	server-52-85-81-68.lax3.r.cloudfront.net
52.85.81.68	A	d1qvlnw6vumhxb.cloudfront.net
52.85.81.72	A	kddi-aem.com
52.85.81.74	A+PTR	server-52-85-81-74.lax3.r.cloudfront.net
52.85.81.79	PTR	server-52-85-81-79.lax3.r.cloudfront.net
52.85.81.91	A+PTR	server-52-85-81-91.atl56.r.cloudfront.net
52.85.81.91	A	server-52-85-81-91.lax3.r.cloudfront.net
52.85.81.91	A	jeffcampau.slack.com
52.85.81.95	A	d3mugcj0iuiiqi.cloudfront.net
52.85.81.97	PTR	server-52-85-81-97.lax3.r.cloudfront.net
52.85.81.97	A	consumer-mbo.slack.com
52.85.81.97	A	gracenote.slack.com
52.85.81.98	A+PTR	server-52-85-81-98.lax3.r.cloudfront.net
52.85.81.98	A	lee-townsley-photographer.com
52.85.81.103	PTR	server-52-85-81-103.lax3.r.cloudfront.net
52.85.81.103	A	www.clarkphotosonline.smugmug.com
52.85.81.103	A	elyriact.smugmug.com
52.85.81.114	A+PTR	server-52-85-81-114.lax3.r.cloudfront.net
52.85.81.129	A+PTR	server-52-85-81-129.lax3.r.cloudfront.net
52.85.81.152	PTR	server-52-85-81-152.lax3.r.cloudfront.net
52.85.81.162	PTR	server-52-85-81-162.lax3.r.cloudfront.net
52.85.81.169	PTR	server-52-85-81-169.lax3.r.cloudfront.net
52.85.81.174	A	bluecat.slack.com
52.85.81.174	A	yj-yahoo-jp-guest.slack.com
52.85.81.174	A	spts-red.slack.com
52.85.81.192	PTR	server-52-85-81-192.lax3.r.cloudfront.net
52.85.81.192	A	mts-huawei-video.slack.com
52.85.81.192	A	cryptocommunityasia.slack.com
52.85.81.211	PTR	server-52-85-81-211.atl56.r.cloudfront.net
52.85.81.211	A	mvd.marystephan.smugmug.com
52.85.81.211	A	mcxplugtests.slack.com
52.85.81.219	A+PTR	server-52-85-81-219.lax3.r.cloudfront.net
52.85.81.225	A+PTR	server-52-85-81-225.lax3.r.cloudfront.net
52.85.81.227	A	rhccommunityenergy.slack.com
52.85.81.227	A	dengjiaqi.slack.com
52.85.81.227	A	hewlett.slack.com
52.85.81.233	A	johannybecerra.smugmug.com
52.85.81.233	A	tarexyhzema105.smugmug.com
52.85.81.239	A+PTR	server-52-85-81-239.lax3.r.cloudfront.net
52.85.81.241	A+PTR	server-52-85-81-241.lax3.r.cloudfront.net
52.85.81.250	PTR	server-52-85-81-250.lax3.r.cloudfront.net