Robtex

Up: 31.13.88.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 31.13.89.0/25
Down right: 31.13.89.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.13.89.1	A+PTR	livestream-edgetee-upload-shv-01-qro1.facebook.com
31.13.89.1	A	edgetee-upload-qro.xx.fbcdn.net
31.13.89.6	A	edge-atlas-shv-01-qro1.facebook.com
31.13.89.12	A+PTR	edge-mqtt-shv-01-qro1.facebook.com
31.13.89.19	A+PTR	edge-star-shv-01-qro1.facebook.com
31.13.89.20	A+PTR	edge-video-shv-01-qro1.fbcdn.net
31.13.89.20	A	video-qro1-1.xx.fbcdn.net
31.13.89.22	A	intern-managed-client-shv-01-qro1.facebook.com
31.13.89.23	PTR	instagram-shv-18-fra3.fbcdn.net
31.13.89.26	A+PTR	xx-fbcdn-shv-01-qro1.fbcdn.net
31.13.89.26	A	scontent-qro1-1.xx.fbcdn.net
31.13.89.32	A	edge-mqtt-mini-shv-01-qro1.facebook.com
31.13.89.34	PTR	edge-sonar-mini-shv-01-qro1.fbcdn.net
31.13.89.34	A	fa89a3d9680-hgyauecn1550816634-sonar.xx.fbcdn.net
31.13.89.34	A	f1fab53ff80k2kgxaiq-vhcfajqe1502258514-sonar.xx.fbcdn.net
31.13.89.35	A+PTR	edge-star-mini-shv-01-qro1.facebook.com
31.13.89.36	A+PTR	edge-z-m-mini-shv-01-qro1.facebook.com
31.13.89.36	A	z-m-scontent-qro1-1.xx.fbcdn.net
31.13.89.51	A+PTR	edge-z-p3-shv-01-qro1.facebook.com
31.13.89.51	A	z-p3-scontent-qro1-1.xx.fbcdn.net
31.13.89.53	A+PTR	whatsapp-cdn-shv-01-qro1.fbcdn.net
31.13.89.53	A	sonar-qro.cdn.whatsapp.net
31.13.89.53	A	www.snr.whatsapp.net
31.13.89.54	A+PTR	whatsapp-chatd-edge-shv-01-qro1.facebook.com
31.13.89.63	A+PTR	instagram-p3-shv-01-qro1.fbcdn.net
31.13.89.63	A	scontent-qro1-1.cdninstagram.com
31.13.89.175	PTR	whatsapp-chatd-igd-p42-edge-shv-01-qro1.facebook.com