Robtex

Up: 157.240.26.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 157.240.26.0/25
Down right: 157.240.26.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
157.240.26.9	A	edge-extern-shv-01-msp1.facebook.com
157.240.26.11	A+PTR	edge-mqtt-shv-01-msp1.facebook.com
157.240.26.18	A+PTR	edge-star-shv-01-msp1.facebook.com
157.240.26.20	A	edge-tcp-tunnel-shv-01-msp1.facebook.com
157.240.26.21	A+PTR	edge-video-shv-01-msp1.fbcdn.net
157.240.26.21	A	video-msp1-1.xx.fbcdn.net
157.240.26.27	A+PTR	xx-fbcdn-shv-01-msp1.fbcdn.net
157.240.26.27	A	scontent-msp1-1.xx.fbcdn.net
157.240.26.32	A	edge-snaptu-http-mini-shv-01-msp1.facebook.com
157.240.26.33	PTR	edge-sonar-mini-shv-01-msp1.fbcdn.net
157.240.26.33	A	f8cfde82080-dwgojewi1549479568-sonar.xz.fbcdn.net
157.240.26.33	A	f6f6b3ad380-phnnwmig1543584655-sonar.xx.fbcdn.net
157.240.26.34	A+PTR	edge-mqtt-mini-shv-01-msp1.facebook.com
157.240.26.35	A+PTR	edge-star-mini-shv-01-msp1.facebook.com
157.240.26.37	A+PTR	edge-z-m-mini-shv-01-msp1.facebook.com
157.240.26.37	A	z-m-scontent-msp1-1.xx.fbcdn.net
157.240.26.48	A+PTR	edge-turnservice-shv-01-msp1.facebook.com
157.240.26.51	A+PTR	edge-z-p3-shv-01-msp1.facebook.com
157.240.26.51	A	z-p3-scontent-msp1-1.xx.fbcdn.net
157.240.26.54	A+PTR	whatsapp-cdn-shv-01-msp1.fbcdn.net
157.240.26.54	A	media-msp1-1.cdn.whatsapp.net
157.240.26.63	A+PTR	instagram-p3-shv-01-msp1.fbcdn.net
157.240.26.63	A	scontent-msp1-1.cdninstagram.com