Robtex

Up: 129.134.30.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 129.134.30.0/25
Down right: 129.134.30.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
129.134.30.11	A	a.ns.c10r.facebook.com
129.134.30.11	A	a.ns.vvv.facebook.com
129.134.30.11	A	a.ns.cdninstagram.com
129.134.30.12	A+PTR	a.ns.facebook.com
129.134.30.12	A	a.ns.tfbnw.net
129.134.30.12	A	a.ns.fbcdn.net