Robtex

Up: 157.240.22.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 157.240.23.0/25
Down right: 157.240.23.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
157.240.23.12	A+PTR	edge-mqtt-shv-01-maa2.facebook.com
157.240.23.19	A+PTR	edge-star-shv-01-maa2.facebook.com
157.240.23.19	A	fhome.me
157.240.23.19	A	freefacebook.net
157.240.23.20	A+PTR	edge-video-shv-01-maa2.fbcdn.net
157.240.23.20	A	video-maa2-1.xx.fbcdn.net
157.240.23.25	A+PTR	xx-fbcdn-shv-01-maa2.fbcdn.net
157.240.23.25	A	scontent-maa2-1.xx.fbcdn.net
157.240.23.25	A	scontent-maa.xx.fbcdn.net
157.240.23.32	A+PTR	edge-mqtt-mini-shv-01-maa2.facebook.com
157.240.23.34	PTR	edge-sonar-mini-shv-01-maa2.fbcdn.net
157.240.23.34	A	fd3eeef9280-nqdntaxy1538579603-sonar.xz.fbcdn.net
157.240.23.34	A	f6a87c90e80-xaoufukv1543140668-sonar.xx.fbcdn.net
157.240.23.35	A+PTR	edge-star-mini-shv-01-maa2.facebook.com
157.240.23.36	A+PTR	edge-z-m-mini-shv-01-maa2.facebook.com
157.240.23.36	A	z-m-scontent-maa2-1.xx.fbcdn.net
157.240.23.51	A+PTR	edge-z-p3-shv-01-maa2.facebook.com
157.240.23.51	A	z-p3-scontent-maa2-1.xx.fbcdn.net
157.240.23.52	A+PTR	edgeray-shv-01-maa2.facebook.com
157.240.23.53	PTR	whatsapp-cdn-shv-01-maa2.fbcdn.net
157.240.23.53	A	w638914471khydpind-gm4tknbshe3damzu.snr.whatsapp.net
157.240.23.53	A	media-maa2-1.cdn.whatsapp.net
157.240.23.54	A+PTR	whatsapp-chatd-edge-shv-01-maa2.facebook.com
157.240.23.63	A+PTR	instagram-p3-shv-01-maa2.fbcdn.net
157.240.23.63	A	scontent-maa2-1.cdninstagram.com
157.240.23.169	A	z-p4.c10r.facebook.com
157.240.23.169	A	z-p4-scontent.xx.fbcdn.net
157.240.23.174	A+PTR	instagram-p42-shv-01-maa2.fbcdn.net