Robtex

Up: 157.240.30.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 157.240.30.0/25
Down right: 157.240.30.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
157.240.30.18	A+PTR	edge-star-shv-01-prg1.facebook.com
157.240.30.21	A+PTR	edge-video-shv-01-prg1.fbcdn.net
157.240.30.21	A	video-prg1-1.xx.fbcdn.net
157.240.30.27	A+PTR	xx-fbcdn-shv-01-prg1.fbcdn.net
157.240.30.27	A	scontent-prg1-1.xx.fbcdn.net
157.240.30.33	PTR	edge-sonar-mini-shv-01-prg1.fbcdn.net
157.240.30.33	A	f65373a3080-oyxrjbqm1544777119-sonar.xz.fbcdn.net
157.240.30.33	A	fc84d944380-kirudowt1547893313-sonar.xz.fbcdn.net
157.240.30.35	A+PTR	edge-star-mini-shv-01-prg1.facebook.com
157.240.30.37	A+PTR	edge-z-m-mini-shv-01-prg1.facebook.com
157.240.30.48	A+PTR	edge-turnservice-shv-01-prg1.facebook.com
157.240.30.49	A+PTR	edge-oculus-shv-01-prg1.fbcdn.net
157.240.30.51	A+PTR	edge-z-p3-shv-01-prg1.facebook.com
157.240.30.51	A	z-p3-scontent-prg1-1.xx.fbcdn.net
157.240.30.52	A+PTR	edgeray-shv-01-prg1.facebook.com
157.240.30.54	A+PTR	whatsapp-cdn-shv-01-prg1.fbcdn.net
157.240.30.54	A	media-prg1-1.cdn.whatsapp.net
157.240.30.55	A+PTR	whatsapp-chatd-edge-shv-01-prg1.facebook.com
157.240.30.63	A+PTR	instagram-p3-shv-01-prg1.fbcdn.net
157.240.30.63	A	scontent-prg1-1.cdninstagram.com
157.240.30.174	A+PTR	instagram-p42-shv-01-prg1.fbcdn.net
157.240.30.174	A	z-p42-scontent-prg1-1.cdninstagram.com