Robtex

Up: 68.65.120.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 68.65.124.0/23
Down right: 68.65.126.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
68.65.124.0	PTR	cache.google.com
68.65.124.12	PTR	cache.google.com
68.65.124.12	A	r1---sn-3pocxg-njxe.gvt1.com
68.65.124.12	A	r1.sn-3pocxg-njxe.googlevideo.com
68.65.124.13	PTR	cache.google.com
68.65.124.30	PTR	cache.google.com
68.65.124.38	PTR	cache.google.com
68.65.124.209	A	external.fagc2-1.fna.fbcdn.net
68.65.124.209	A	scontent.fagc2-1.fna.fbcdn.net
68.65.124.210	A	video.fagc2-1.fna.fbcdn.net
68.65.124.224	A	instagram.fagc2-1.fna.fbcdn.net
68.65.124.225	A	media.fagc2-1.fna.whatsapp.net
68.65.124.226	A	z-p3-scontent.fagc2-1.fna.fbcdn.net