Robtex

Up: 54.192.76.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 54.192.78.0/24
Down right: 54.192.79.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
54.192.78.16	A+PTR	server-54-192-78-16.hio50.r.cloudfront.net
54.192.78.16	A	server-54-192-78-16.cdg50.r.cloudfront.net
54.192.78.76	A+PTR	server-54-192-78-76.cdg50.r.cloudfront.net
54.192.78.77	A+PTR	server-54-192-78-77.hio50.r.cloudfront.net
54.192.78.101	PTR	server-54-192-78-101.cdg50.r.cloudfront.net
54.192.78.101	A	fgroupworkspace.slack.com
54.192.78.101	A	keyrusrocks.slack.com
54.192.78.136	A+PTR	server-54-192-78-136.cdg50.r.cloudfront.net
54.192.78.136	A	census-comet.slack.com
54.192.78.180	A+PTR	server-54-192-78-180.cdg50.r.cloudfront.net
54.192.78.210	PTR	server-54-192-78-210.cdg50.r.cloudfront.net
54.192.78.210	A	andr-5f9c4ab08c-968e2d5b08687bf4-e886b78345b25545e1-2390116.na.ec.api.amazonvideo.com
54.192.78.210	A	andr-5f9c4ab08c-c44be9f7948957db-9d8e0553560a7ed368-2390116.na.ec.api.amazonvideo.com
54.192.78.212	A+PTR	server-54-192-78-212.cdg50.r.cloudfront.net
54.192.78.234	A+PTR	server-54-192-78-234.cdg50.r.cloudfront.net
54.192.79.54	A+PTR	server-54-192-79-54.cdg50.r.cloudfront.net
54.192.79.60	A+PTR	server-54-192-79-60.cdg50.r.cloudfront.net
54.192.79.71	A+PTR	server-54-192-79-71.cdg50.r.cloudfront.net
54.192.79.105	A+PTR	server-54-192-79-105.cdg50.r.cloudfront.net
54.192.79.106	A+PTR	server-54-192-79-106.cdg50.r.cloudfront.net
54.192.79.119	A+PTR	server-54-192-79-119.cdg50.r.cloudfront.net
54.192.79.133	PTR	server-54-192-79-133.hio50.r.cloudfront.net
54.192.79.133	A	server-54-192-79-133.cdg50.r.cloudfront.net
54.192.79.152	PTR	server-54-192-79-152.hio50.r.cloudfront.net
54.192.79.152	A	server-54-192-79-152.cdg50.r.cloudfront.net
54.192.79.154	A+PTR	server-54-192-79-154.hio50.r.cloudfront.net
54.192.79.166	A+PTR	server-54-192-79-166.hio50.r.cloudfront.net
54.192.79.166	A	server-54-192-79-166.cdg50.r.cloudfront.net
54.192.79.172	A+PTR	server-54-192-79-172.cdg50.r.cloudfront.net