Robtex

Up: 157.240.204.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 157.240.205.0/25
Down right: 157.240.205.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
157.240.205.1	PTR	edge-star-shv-01-hel3.facebook.com
157.240.205.1	A	fb.gg
157.240.205.1	A	faacebook.com
157.240.205.19	A+PTR	edge-mqtt-shv-01-hel3.facebook.com
157.240.205.34	PTR	edge-mqtt-mini-shv-01-hel3.facebook.com
157.240.205.38	A	f7e13e7ea80-nftczmel1548990428-sonar.xz.fbcdn.net
157.240.205.60	A+PTR	whatsapp-cdn-shv-01-hel3.fbcdn.net
157.240.205.61	PTR	whatsapp-chatd-edge-shv-01-hel3.facebook.com
157.240.205.62	PTR	edgeray-shv-01-hel3.facebook.com
157.240.205.63	A+PTR	instagram-p3-shv-01-hel3.fbcdn.net