Robtex

Up: 31.13.84.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 31.13.84.0/25
Down right: 31.13.84.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.13.84.1	PTR	edge-atlas-shv-01-vie1.facebook.com
31.13.84.1	A	www.xpjtd.com
31.13.84.1	A	tx8ff.com
31.13.84.2	A+PTR	edge-mqtt-shv-01-vie1.facebook.com
31.13.84.2	A	baiwanzy.com
31.13.84.3	A+PTR	edge-fblite-ws-p1-shv-01-vie1.facebook.com
31.13.84.3	A	netprobe-bgp-01-vie1.facebook.com
31.13.84.4	PTR	xx-fbcdn-shv-01-vie1.fbcdn.net
31.13.84.4	A	f3bc3c43980kxbdkn6q-gxbqngbg1490026490-sonar.xz.fbcdn.net
31.13.84.4	A	fe062795480kh3yqloi-tldubaij1499327137-sonar.xx.fbcdn.net
31.13.84.5	A+PTR	edge-stun-shv-01-vie1.facebook.com
31.13.84.5	A	edge-z-shv-01-vie1.facebook.com
31.13.84.5	A	edge-cryptossl-shv-01-vie1.facebook.com
31.13.84.6	A+PTR	edge-z-m-shv-01-vie1.facebook.com
31.13.84.7	A+PTR	z-m-fbcdn-shv-01-vie1.fbcdn.net
31.13.84.8	PTR	edge-star-shv-01-vie1.facebook.com
31.13.84.8	A	hzvpn.com
31.13.84.8	A	wd66884.com
31.13.84.10	A+PTR	instagram-shv-01-vie1.fbcdn.net
31.13.84.12	PTR	edge-liverail-shv-01-vie1.facebook.com
31.13.84.12	A	www.yfwsj.com
31.13.84.12	A	comeonss.com
31.13.84.13	A+PTR	edge-snaptu-http-p1-shv-01-vie1.facebook.com
31.13.84.15	A+PTR	edge-video-shv-01-vie1.fbcdn.net
31.13.84.15	A	video-b-vie.xx.fbcdn.net
31.13.84.15	A	video-vie1-1.xx.fbcdn.net
31.13.84.16	PTR	livestream-edgetee-upload-shv-01-vie1.facebook.com
31.13.84.16	A	www.xpjtd.com
31.13.84.16	A	6611900.com
31.13.84.17	A+PTR	edge-secure-shv-01-vie1.facebook.com
31.13.84.17	A	sf123.org
31.13.84.17	A	cevb.cn
31.13.84.19	PTR	perfedge-m-shv-02-vie1.facebook.com
31.13.84.19	A	edge-extern-shv-01-vie1.facebook.com
31.13.84.20	PTR	xx-fbcdn-shv-02-vie1.fbcdn.net
31.13.84.20	A	edgetee-vie.xx.fbcdn.net
31.13.84.20	A	edgetee-vie1-1.xx.fbcdn.net
31.13.84.21	PTR	edge-z-shv-02-vie1.facebook.com
31.13.84.21	A	edge-z-p1-shv-01-vie1.facebook.com
31.13.84.22	PTR	edge-z-m-shv-02-vie1.facebook.com
31.13.84.23	PTR	edge-msgr-latest-shv-01-vie1.facebook.com
31.13.84.23	A	edge-livestream-api-upload-shv-01-vie1.facebook.com
31.13.84.25	A	edge-resolver002-bgp-01-vie1.facebook.com
31.13.84.28	A	edge-shortwave-shv-01-vie1.facebook.com
31.13.84.32	A+PTR	instagram-p15-shv-01-vie1.fbcdn.net
31.13.84.33	PTR	edge-snaptu-http-mini-shv-01-vie1.facebook.com
31.13.84.34	A+PTR	edge-mqtt-mini-shv-01-vie1.facebook.com
31.13.84.35	PTR	edge-sonar-mini-shv-01-vie1.fbcdn.net
31.13.84.35	A	fe062795480kh3yqloi-tldubaij1499327137-sonar.xx.fbcdn.net
31.13.84.35	A	fa89a3d9680-hgyauecn1550816634-sonar.xx.fbcdn.net
31.13.84.36	A+PTR	edge-star-mini-shv-01-vie1.facebook.com
31.13.84.36	A	gyswsj.com
31.13.84.36	A	www.smvpn.top
31.13.84.37	A+PTR	edge-z-m-mini-shv-01-vie1.facebook.com
31.13.84.38	PTR	edge-fblite-tcp-mini-shv-01-vie1.facebook.com
31.13.84.38	A	z-m-scontent-vie.xx.fbcdn.net
31.13.84.38	A	z-m-fbcdn-mini-shv-01-vie1.fbcdn.net
31.13.84.40	A+PTR	edge-z-1-p2-shv-01-vie1.facebook.com
31.13.84.40	A	z-1-video-vie1-1.xx.fbcdn.net
31.13.84.40	A	todayfacebook.com
31.13.84.48	A+PTR	edgeray-shv-01-vie1.facebook.com
31.13.84.49	A+PTR	whatsapp-chatd-edge-shv-01-vie1.facebook.com
31.13.84.49	A	edge-turn-bgp-01-vie1.facebook.com
31.13.84.50	A+PTR	edge-oculus-shv-01-vie1.fbcdn.net
31.13.84.51	A+PTR	whatsapp-cdn-shv-01-vie1.fbcdn.net
31.13.84.51	A	sonar-vie.cdn.whatsapp.net
31.13.84.51	A	w5602d01b1kk67toja-gi2dsmjugi3dkmbx.snr.whatsapp.net
31.13.84.52	A+PTR	instagram-p3-shv-01-vie1.fbcdn.net
31.13.84.52	A	scontent-vie1-1.cdninstagram.com
31.13.84.52	A	scontent-vie.cdninstagram.com
31.13.84.53	A+PTR	edge-z-p3-shv-01-vie1.facebook.com
31.13.84.53	A	z-p3-scontent-vie1-1.xx.fbcdn.net
31.13.84.53	A	z-p3-external-vie1-1.xx.fbcdn.net
31.13.84.54	A+PTR	edge-turnservice-shv-01-vie1.facebook.com
31.13.84.85	PTR	xx-fbcdn-shv-06-vie1.fbcdn.net
31.13.84.169	A+PTR	edge-z-p4-shv-01-vie1.facebook.com
31.13.84.169	A	z-p4-scontent-vie1-1.xx.fbcdn.net
31.13.84.170	A+PTR	edge-mqtt-p4-shv-01-vie1.facebook.com
31.13.84.172	A+PTR	instagram-p4-shv-01-vie1.fbcdn.net
31.13.84.172	A	z-p4-scontent-vie1-1.cdninstagram.com
31.13.84.174	A+PTR	instagram-p42-shv-01-vie1.fbcdn.net
31.13.84.174	A	z-p42-scontent-vie1-1.cdninstagram.com
31.13.84.208	A+PTR	edge-rtp-relay-40000-shv-01-vie1.facebook.com