Robtex

Up: 13.33.7.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 13.33.7.0/26
Down right: 13.33.7.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
13.33.7.9	A+PTR	server-13-33-7-9.nrt12.r.cloudfront.net
13.33.7.25	PTR	server-13-33-7-25.nrt12.r.cloudfront.net
13.33.7.25	A	groove-x.slack.com
13.33.7.25	A	socit.slack.com
13.33.7.26	A+PTR	server-13-33-7-26.nrt12.r.cloudfront.net
13.33.7.26	A	dmlzrp08y9ezs.cloudfront.net
13.33.7.29	A+PTR	server-13-33-7-29.nrt12.r.cloudfront.net
13.33.7.29	A	d1lndjog12i23s.cloudfront.net
13.33.7.29	A	dpwa6t7sl9tbx.cloudfront.net
13.33.7.65	A	xfel-da-support.slack.com
13.33.7.65	A	yj-splunk-pf.slack.com
13.33.7.65	A	business-boomers.slack.com
13.33.7.70	A+PTR	server-13-33-7-70.nrt12.r.cloudfront.net
13.33.7.70	A	d1999nk8amimn5.cloudfront.net
13.33.7.80	A+PTR	server-13-33-7-80.nrt12.r.cloudfront.net
13.33.7.80	A	d2h2wpkpo0d9w3.cloudfront.net
13.33.7.87	A+PTR	server-13-33-7-87.nrt12.r.cloudfront.net
13.33.7.87	A	d1swfkm9jnbhnd.cloudfront.net
13.33.7.88	A+PTR	server-13-33-7-88.nrt12.r.cloudfront.net
13.33.7.88	A	d1kd1zvm2ygpa7.cloudfront.net
13.33.7.101	A+PTR	server-13-33-7-101.nrt12.r.cloudfront.net
13.33.7.101	A	d1288oy1lr38yq.cloudfront.net
13.33.7.103	PTR	server-13-33-7-103.iad50.r.cloudfront.net
13.33.7.103	A	server-13-33-7-103.nrt12.r.cloudfront.net
13.33.7.103	A	d3096yjj1xrhao.cloudfront.net
13.33.7.119	A+PTR	server-13-33-7-119.nrt12.r.cloudfront.net