Robtex

Up: 13.225.16.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 13.225.16.0/24
Down right: 13.225.17.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
13.225.16.230	A+PTR	server-13-225-16-230.bru50.r.cloudfront.net
13.225.16.230	A	d3h82lxqgzj946.cloudfront.net
13.225.17.152	A+PTR	server-13-225-17-152.bru50.r.cloudfront.net
13.225.17.152	A	nbc-bakong-dev.slack.com
13.225.17.152	A	seattlejshackers.slack.com