Robtex

Up: 13.33.7.0/25
Can't show all results, try to descend to a more specific CIDR
Down left: 13.33.7.0/27
Down right: 13.33.7.32/27
(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