Robtex

Up: 129.134.30.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 129.134.31.0/25
Down right: 129.134.31.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
129.134.31.11	A	b.ns.xx.fbcdn.net
129.134.31.11	A	b.ns.xy.fbcdn.net
129.134.31.11	A	b.ns.cdn.whatsapp.net
129.134.31.12	A+PTR	b.ns.facebook.com
129.134.31.12	A	b.ns.fbcdn.net
129.134.31.12	A	b.ns.thefacebook.com