Robtex

Up: 52.85.248.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 52.85.250.0/24
Down right: 52.85.251.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
52.85.250.10	PTR	server-52-85-250-10.ams1.r.cloudfront.net
52.85.250.20	PTR	server-52-85-250-20.ams1.r.cloudfront.net
52.85.250.20	A	lumencommunity.slack.com
52.85.250.20	A	ibm-systems.slack.com
52.85.250.23	A	peoplesearch.com
52.85.250.36	A	httpoxy.com
52.85.250.40	A	httpoxy.com
52.85.250.41	A	peoplesearch.com
52.85.250.45	A+PTR	server-52-85-250-45.ams1.r.cloudfront.net
52.85.250.75	A+PTR	server-52-85-250-75.ams1.r.cloudfront.net
52.85.250.75	A	download.slack.com
52.85.250.75	A	wrcandidates.slack.com
52.85.250.87	A+PTR	server-52-85-250-87.ams1.r.cloudfront.net
52.85.250.91	A+PTR	server-52-85-250-91.ams1.r.cloudfront.net
52.85.250.91	A	fast-appz.com
52.85.250.144	PTR	server-52-85-250-144.ams1.r.cloudfront.net
52.85.250.180	A+PTR	server-52-85-250-180.ams1.r.cloudfront.net
52.85.250.180	A	adccore.slack.com
52.85.250.182	PTR	server-52-85-250-182.jnb50.r.cloudfront.net
52.85.250.182	A	httpoxy.com
52.85.250.195	A	httpoxy.com
52.85.250.226	A	peoplesearch.com
52.85.250.232	A+PTR	server-52-85-250-232.ams1.r.cloudfront.net
52.85.250.241	A	peoplesearch.com
52.85.251.70	A+PTR	server-52-85-251-70.ams1.r.cloudfront.net
52.85.251.75	A+PTR	server-52-85-251-75.ams1.r.cloudfront.net
52.85.251.78	A+PTR	server-52-85-251-78.ams1.r.cloudfront.net