Robtex

Up: 157.240.224.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 157.240.225.0/25
Down right: 157.240.225.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
157.240.225.39	A	f1333453080kdaflosa-hirctnnl1489118440-sonar.xz.fbcdn.net
157.240.225.39	A	fa3374a2e80kvrt2dyq-radmbqoe1496231565-sonar.xz.fbcdn.net
157.240.225.39	A	f771eb12880-ythwcdlr1542871383-sonar.xz.fbcdn.net
157.240.225.60	A+PTR	whatsapp-cdn-shv-01-man2.fbcdn.net