Robtex

Up: 13.33.16.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 13.33.16.0/25
Down right: 13.33.16.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
13.33.16.16	PTR	server-13-33-16-16.arn53.r.cloudfront.net
13.33.16.16	A	telummedia.slack.com
13.33.16.27	A	release.slack.com
13.33.16.27	A	skillfactory-ml3.slack.com
13.33.16.50	A+PTR	server-13-33-16-50.arn53.r.cloudfront.net
13.33.16.50	A	hci-xio4084.slack.com
13.33.16.59	A+PTR	server-13-33-16-59.arn53.r.cloudfront.net
13.33.16.59	A	dtvlatamott.slack.com
13.33.16.59	A	rakutenrewards.slack.com
13.33.16.122	A+PTR	server-13-33-16-122.arn53.r.cloudfront.net
13.33.16.122	A	lru9cbct.micpn.com
13.33.16.122	A	0mmvoxva.micpn.com
13.33.16.132	A	zelayan.slack.com
13.33.16.132	A	swarovski-csi.slack.com
13.33.16.178	A	redmineparty.slack.com
13.33.16.178	A	ctleelab.slack.com
13.33.16.209	A	walletsberbank.slack.com
13.33.16.209	A	firmsecurehq.slack.com
13.33.16.209	A	gridinsoft-teamgroup.slack.com
13.33.16.240	A	asjads.slack.com