Robtex

Up: 69.171.254.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 69.171.255.0/25
Down right: 69.171.255.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
69.171.255.11	A	b.ns.xx.fbcdn.net
69.171.255.11	A	b.ns.xy.fbcdn.net
69.171.255.11	A	b.ns.cdn.whatsapp.net
69.171.255.12	A	b.ns.fbcdn.net
69.171.255.12	A	b.ns.thefacebook.com
69.171.255.12	A	xn--fiqs8s7zfhxek67b1uuwsj.com