Robtex

Up: 157.240.192.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 157.240.192.0/25
Down right: 157.240.192.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
157.240.192.1	A+PTR	livestream-edgetee-upload-shv-02-maa2.facebook.com
157.240.192.1	A	edgetee-upload-maa.xx.fbcdn.net
157.240.192.10	A+PTR	edge-video-shv-02-maa2.fbcdn.net
157.240.192.10	A	video-maa2-2.xx.fbcdn.net
157.240.192.16	A+PTR	xx-fbcdn-shv-02-maa2.fbcdn.net
157.240.192.16	A	scontent-maa2-2.xx.fbcdn.net
157.240.192.16	A	scontent-maa.xx.fbcdn.net
157.240.192.18	A+PTR	edge-star-shv-02-maa2.facebook.com
157.240.192.25	A+PTR	edge-mqtt-shv-02-maa2.facebook.com
157.240.192.34	A+PTR	edge-mqtt-mini-shv-02-maa2.facebook.com
157.240.192.35	A+PTR	edge-star-mini-shv-02-maa2.facebook.com
157.240.192.36	A+PTR	edge-z-m-mini-shv-02-maa2.facebook.com
157.240.192.36	A	z-m-scontent-maa2-2.xx.fbcdn.net
157.240.192.38	PTR	edge-sonar-mini-shv-02-maa2.fbcdn.net
157.240.192.38	A	fbb17226a80kzqioyzi-zrglsyix1490485026-sonar.xz.fbcdn.net
157.240.192.38	A	f4e4e2f2380-qqwfxgay1548638686-sonar.xz.fbcdn.net
157.240.192.50	A+PTR	edgeray-shv-02-maa2.facebook.com
157.240.192.52	A+PTR	whatsapp-cdn-shv-02-maa2.fbcdn.net
157.240.192.52	A	media-maa2-2.cdn.whatsapp.net
157.240.192.55	A+PTR	whatsapp-chatd-edge-shv-02-maa2.facebook.com
157.240.192.63	A+PTR	instagram-p3-shv-02-maa2.fbcdn.net
157.240.192.63	A	scontent-maa2-2.cdninstagram.com