Robtex

Up: 54.192.5.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 54.192.5.128/26
Down right: 54.192.5.192/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
54.192.5.141	A+PTR	server-54-192-5-141.dfw3.r.cloudfront.net
54.192.5.158	PTR	server-54-192-5-158.dfw3.r.cloudfront.net
54.192.5.160	A+PTR	server-54-192-5-160.dfw3.r.cloudfront.net
54.192.5.165	A+PTR	server-54-192-5-165.dfw3.r.cloudfront.net
54.192.5.173	PTR	server-54-192-5-173.dfw3.r.cloudfront.net
54.192.5.173	A	wagone.slack.com
54.192.5.173	A	centralmagicjudges.slack.com
54.192.5.189	A+PTR	server-54-192-5-189.dfw3.r.cloudfront.net
54.192.5.190	A+PTR	server-54-192-5-190.dfw3.r.cloudfront.net
54.192.5.190	A	irc.slack.com
54.192.5.213	PTR	server-54-192-5-213.gru1.r.cloudfront.net
54.192.5.213	A	esbhollandcasino.slack.com
54.192.5.213	A	smreviewerspace.slack.com
54.192.5.214	A+PTR	server-54-192-5-214.dfw3.r.cloudfront.net
54.192.5.214	A	ed-sec.smugmug.com
54.192.5.228	A+PTR	server-54-192-5-228.dfw3.r.cloudfront.net
54.192.5.229	A	pikstudios.smugmug.com
54.192.5.238	A+PTR	server-54-192-5-238.dfw3.r.cloudfront.net