Robtex

Up: 157.240.220.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 157.240.220.0/25
Down right: 157.240.220.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
157.240.220.8	A+PTR	edge-video-shv-01-bos3.fbcdn.net
157.240.220.8	A	video-bos3-1.xx.fbcdn.net
157.240.220.14	A+PTR	xx-fbcdn-shv-01-bos3.fbcdn.net
157.240.220.16	A+PTR	edge-star-shv-01-bos3.facebook.com
157.240.220.16	A	facebook-consulting.net
157.240.220.35	A+PTR	edge-star-mini-shv-01-bos3.facebook.com
157.240.220.36	A	z-m-scontent-bos3-1.xx.fbcdn.net
157.240.220.38	A	f01a7842d80kdno4pyq-imrtmang1501842230-sonar.xz.fbcdn.net
157.240.220.38	A	fb4007e2980kyauwara-zmiogokl1489176524-sonar.xz.fbcdn.net
157.240.220.38	A	fe63be25980-fhyrnfob1550402183-sonar.xx.fbcdn.net
157.240.220.60	PTR	whatsapp-cdn-shv-01-bos3.fbcdn.net
157.240.220.60	A	w7ef4a7d91ksthfxnc-ge3dkmzyge4tmnby.snr.whatsapp.net
157.240.220.60	A	media-bos3-1.cdn.whatsapp.net
157.240.220.62	PTR	edgeray-shv-01-bos3.facebook.com
157.240.220.63	A+PTR	instagram-p3-shv-01-bos3.fbcdn.net