Robtex

Up: 13.32.220.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 13.32.220.0/25
Down right: 13.32.220.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
13.32.220.47	A+PTR	server-13-32-220-47.fra56.r.cloudfront.net
13.32.220.47	A	cerbo.slack.com
13.32.220.47	A	q18.slack.com
13.32.220.51	A	work.slack.com
13.32.220.51	A	sockspill.www.shop.swarmgroup.slack.com
13.32.220.51	A	pad956.slack.com
13.32.220.54	A+PTR	server-13-32-220-54.fra56.r.cloudfront.net
13.32.220.54	A	6xulsokz.micpn.com
13.32.220.77	A+PTR	server-13-32-220-77.fra56.r.cloudfront.net