Robtex

Up: 52.85.216.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 52.85.217.0/25
Down right: 52.85.217.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
52.85.217.2	A+PTR	server-52-85-217-2.cdg3.r.cloudfront.net
52.85.217.2	A	polaris.slack.com
52.85.217.2	A	product-hive.slack.com
52.85.217.10	A+PTR	server-52-85-217-10.cdg51.r.cloudfront.net
52.85.217.18	A	d2fip2zjdheo1u.cloudfront.net
52.85.217.41	A+PTR	server-52-85-217-41.cdg51.r.cloudfront.net
52.85.217.41	A	d11ckpbjvxjfw8.cloudfront.net
52.85.217.53	A+PTR	server-52-85-217-53.cdg51.r.cloudfront.net
52.85.217.62	A	wopi-test.dropbox.com
52.85.217.70	A+PTR	server-52-85-217-70.cdg51.r.cloudfront.net
52.85.217.77	A+PTR	server-52-85-217-77.cdg3.r.cloudfront.net
52.85.217.80	A+PTR	server-52-85-217-80.cdg51.r.cloudfront.net
52.85.217.108	A+PTR	server-52-85-217-108.cdg51.r.cloudfront.net
52.85.217.145	PTR	server-52-85-217-145.cdg3.r.cloudfront.net
52.85.217.145	A	presentation-hz72146.slack.com
52.85.217.145	A	qualitychqm50.slack.com
52.85.217.157	PTR	server-52-85-217-157.jnb50.r.cloudfront.net
52.85.217.157	A	auth0.slack.com
52.85.217.160	A+PTR	server-52-85-217-160.cdg51.r.cloudfront.net
52.85.217.160	A	nugu-team.slack.com
52.85.217.160	A	teamte10.slack.com
52.85.217.178	A	static-cdn.e2ma.net
52.85.217.228	A	socialrobotcommunity.slack.com
52.85.217.239	A+PTR	server-52-85-217-239.cdg51.r.cloudfront.net
52.85.217.240	A+PTR	server-52-85-217-240.cdg51.r.cloudfront.net
52.85.217.250	A+PTR	server-52-85-217-250.cdg3.r.cloudfront.net
52.85.217.250	A	controlpanel.slack.com
52.85.217.250	A	aexp-imdp.slack.com