Robtex

Up: 13.33.6.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 13.33.7.0/25
Down right: 13.33.7.128/25
(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
13.33.7.129	A+PTR	server-13-33-7-129.nrt12.r.cloudfront.net
13.33.7.129	A	d26la7dhla1iry.cloudfront.net
13.33.7.129	A	d3bednuext4kar.cloudfront.net
13.33.7.132	A+PTR	server-13-33-7-132.nrt12.r.cloudfront.net
13.33.7.132	A	d2q82aua2c0486.cloudfront.net
13.33.7.145	A+PTR	server-13-33-7-145.nrt12.r.cloudfront.net
13.33.7.145	A	d25l45ah9h25if.cloudfront.net
13.33.7.146	A+PTR	server-13-33-7-146.nrt12.r.cloudfront.net
13.33.7.146	A	api-dist-ss.pod-point.com
13.33.7.154	A+PTR	server-13-33-7-154.nrt12.r.cloudfront.net
13.33.7.154	A	d2az4ip7177sb5.cloudfront.net
13.33.7.154	A	d34ue60hib4v0z.cloudfront.net
13.33.7.157	A+PTR	server-13-33-7-157.nrt12.r.cloudfront.net
13.33.7.157	A	d2rt30yebbl5hr.cloudfront.net
13.33.7.171	A+PTR	server-13-33-7-171.nrt12.r.cloudfront.net
13.33.7.171	A	d2g3h70ydrc73d.cloudfront.net
13.33.7.177	A+PTR	server-13-33-7-177.nrt12.r.cloudfront.net
13.33.7.177	A	d38v4fugrxo9pz.cloudfront.net
13.33.7.183	A+PTR	server-13-33-7-183.nrt12.r.cloudfront.net
13.33.7.240	A+PTR	server-13-33-7-240.nrt12.r.cloudfront.net
13.33.7.240	A	d2x8klociyv0ac.cloudfront.net
13.33.7.241	A+PTR	server-13-33-7-241.nrt12.r.cloudfront.net
13.33.7.241	A	dd1uglxjwsq0a.cloudfront.net