Robtex

Up: 157.240.222.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 157.240.223.0/25
Down right: 157.240.223.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
157.240.223.15	A+PTR	xx-fbcdn-shv-01-muc2.fbcdn.net
157.240.223.15	A	scontent-muc2-1.xx.fbcdn.net
157.240.223.39	A	f5d2fa83780kmfv3kjy-mjebwygm1496569608-sonar.xz.fbcdn.net
157.240.223.39	A	f4f91b37880k2kgxaiq-drdcblfn1484210319-sonar.xx.fbcdn.net
157.240.223.39	A	fdd608e8c80kyoji6qy-plcwggux1526062485-sonar.xz.fbcdn.net
157.240.223.55	PTR	edgeray-msgr-shv-01-muc2.facebook.com
157.240.223.60	A	wed41c4aa1kqpgp4tb-gmzdknzxha4tombx.snr.whatsapp.net
157.240.223.63	A+PTR	instagram-p3-shv-01-muc2.fbcdn.net
157.240.223.63	A	scontent-muc2-1.cdninstagram.com