Robtex

Up: 31.13.76.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 31.13.77.0/25
Down right: 31.13.77.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.13.77.1	A+PTR	netprobe-bgp-01-sjc2.facebook.com
31.13.77.2	A+PTR	edge-atlas-shv-01-sjc2.facebook.com
31.13.77.3	A+PTR	edge-resolver002-bgp-01-hkt1.facebook.com
31.13.77.3	A	lb02.01.sjc1.tfbnw.net
31.13.77.3	A	edge-snaptu-http-p1-shv-01-sjc2.facebook.com
31.13.77.4	A	www.ch-zn.beta.facebook.com
31.13.77.4	A	www.beta.beta.beta.ebta.beta.ebta.beta.ebat.beta.facebook.com
31.13.77.4	A	fb.m.alpha.facebook.com
31.13.77.5	A+PTR	edge-mqtt-shv-01-sjc2.facebook.com
31.13.77.5	A	edgetee-upload-hkt.xx.fbcdn.net
31.13.77.5	A	edgetee-upload-hkt1-1.xx.fbcdn.net
31.13.77.6	PTR	edge-fblite-tcp-p1-shv-01-hkt1.facebook.com
31.13.77.6	A	cy-gb.hi-in.fbjs.facebook.com
31.13.77.6	A	el-gr.alex.c.facebook.com
31.13.77.7	A	secure-edge-latest-shv-01-sjc2.facebook.com
31.13.77.7	A	secure-latest.c10r.facebook.com
31.13.77.9	A+PTR	wapinger-bgp-01-sjc2.facebook.com
31.13.77.9	A	edge-video-shv-01-hkt1.fbcdn.net
31.13.77.9	A	video-hkt1-1.xx.fbcdn.net
31.13.77.10	A+PTR	edge-mqtt-latest-shv-01-sjc2.facebook.com
31.13.77.11	A+PTR	edge-video-shv-01-sjc2.fbcdn.net
31.13.77.11	A	video-sjc2-1.xx.fbcdn.net
31.13.77.12	PTR	edge-latest-shv-01-hkt1.facebook.com
31.13.77.12	A	fe7d7eee880kz2xm2li-boxuledv1496545837-sonar.xx.fbcdn.net
31.13.77.12	A	fef60cfa880k2e2276i-luszkftm1496272649-sonar.xx.fbcdn.net
31.13.77.13	A	shortwave-ws.c10r.facebook.com
31.13.77.13	A	edge-shortwave-ws-shv-01-sjc2.facebook.com
31.13.77.14	A	edge-atlas-shv-01-hkt1.facebook.com
31.13.77.14	A	edge-sonar-shv-01-sjc2.fbcdn.net
31.13.77.15	A+PTR	xx-fbcdn-shv-01-hkt1.fbcdn.net
31.13.77.15	A	scontent-hkt1-1.xx.fbcdn.net
31.13.77.16	A	livestream-edgetee-upload-shv-01-sjc2.facebook.com
31.13.77.17	A+PTR	edge-star-shv-01-hkt1.facebook.com
31.13.77.17	A	edge-secure-shv-01-sjc2.facebook.com
31.13.77.19	A+PTR	edge-extern-shv-01-sjc2.facebook.com
31.13.77.19	A	our.cstools.facebook.com
31.13.77.19	A	apps.cstools.facebook.com
31.13.77.20	PTR	edge-services-shv-01-hkt1.facebook.com
31.13.77.20	A	edgetee-sjc2-1.xx.fbcdn.net
31.13.77.20	A	livestream-edgetee-shv-01-sjc2.facebook.com
31.13.77.21	A	edge-z-p1-shv-01-sjc2.facebook.com
31.13.77.21	A	z-p1.c10r.facebook.com
31.13.77.23	A	edge-livestream-api-upload-shv-01-sjc2.facebook.com
31.13.77.24	A+PTR	edge-mqtt-shv-01-hkt1.facebook.com
31.13.77.28	A	edge-shortwave-shv-01-sjc2.facebook.com
31.13.77.32	A+PTR	edge-z-mini-shv-01-sjc2.facebook.com
31.13.77.33	PTR	edge-fblite-tcp-mini-shv-01-hkt1.facebook.com
31.13.77.33	A	www.zhaokf.com
31.13.77.33	A	amyxt.com
31.13.77.34	A+PTR	edge-mqtt-mini-shv-01-hkt1.facebook.com
31.13.77.34	A	smcp555.com
31.13.77.34	A	www.wlswsj.com
31.13.77.35	A+PTR	edge-star-mini-shv-01-hkt1.facebook.com
31.13.77.35	A	fe7d7eee880kz2xm2li-boxuledv1496545837-sonar.xx.fbcdn.net
31.13.77.35	A	fee0f52f080kdno4pyq-kplnkthl1505192989-sonar.xz.fbcdn.net
31.13.77.36	A	19808.net
31.13.77.36	A	longfengwl.com
31.13.77.36	A	168sb.net
31.13.77.37	A+PTR	edge-z-m-mini-shv-01-hkt1.facebook.com
31.13.77.37	A	z-m-scontent-hkt1-1.xx.fbcdn.net
31.13.77.37	A	freebasiks.com
31.13.77.38	A+PTR	z-m-fbcdn-mini-shv-01-sjc2.fbcdn.net
31.13.77.38	A	z-m-scontent-sjc2-1.xx.fbcdn.net
31.13.77.38	A	hxvpnw.com
31.13.77.39	A	shvpn5.com
31.13.77.39	A	iorg-fba-edge-shv-01-sjc2.facebook.com
31.13.77.39	A	z-1-scontent-hkg3-2.xx.fbcdn.net
31.13.77.40	A+PTR	edge-z-1-p2-shv-01-sjc2.facebook.com
31.13.77.40	A	z-1-scontent-sjc2-1.xx.fbcdn.net
31.13.77.40	A	z-1-external-sjc2-1.xx.fbcdn.net
31.13.77.41	A+PTR	edge-snaptu-http-p2-shv-01-sjc2.facebook.com
31.13.77.48	PTR	edgeray-shv-01-sjc2.facebook.com
31.13.77.49	PTR	whatsapp-cdn-shv-01-sjc2.fbcdn.net
31.13.77.49	A	cctwsj.com
31.13.77.49	A	webb7bc6c1k2bldamd-ge4dcmrtgyytcmjs.snr.whatsapp.net
31.13.77.50	A	8657799.com
31.13.77.51	A	oculus.c10r.facebook.com
31.13.77.51	A	edge-oculus-shv-01-sjc2.fbcdn.net
31.13.77.52	PTR	instagram-p3-shv-01-sjc2.fbcdn.net
31.13.77.52	A	appspot.com--hfbphf.cn.zhongsou.net
31.13.77.52	A	scontent-sjc2-1.cdninstagram.com
31.13.77.53	A	edge-z-p3-shv-01-sjc2.facebook.com
31.13.77.53	A	z-p3-scontent-sjc2-1.xx.fbcdn.net
31.13.77.53	A	z-p3-scontent.xx.fbcdn.net
31.13.77.54	A+PTR	edge-turnservice-shv-01-sjc2.facebook.com
31.13.77.54	A	top.cn3721.org
31.13.77.54	A	w022666.com
31.13.77.55	PTR	wit-edge-shv-01-hkt1.facebook.com
31.13.77.55	A	amyxt.com
31.13.77.55	A	344545u.com
31.13.77.60	A+PTR	whatsapp-cdn-shv-01-hkt1.fbcdn.net
31.13.77.60	A	sonar-hkt.cdn.whatsapp.net
31.13.77.60	A	media-hkt1-1.cdn.whatsapp.net
31.13.77.61	A+PTR	whatsapp-chatd-edge-shv-01-hkt1.facebook.com
31.13.77.63	A+PTR	instagram-p3-shv-01-hkt1.fbcdn.net
31.13.77.63	A	scontent-hkt1-1.cdninstagram.com
31.13.77.169	PTR	edge-z-p4-shv-01-hkt1.facebook.com
31.13.77.169	A	edge-z-p4-shv-01-sjc2.facebook.com
31.13.77.169	A	z-p4.c10r.facebook.com
31.13.77.170	PTR	edge-mqtt-p4-shv-01-sjc2.facebook.com
31.13.77.174	A+PTR	instagram-p42-shv-01-hkt1.fbcdn.net
31.13.77.174	A	instagram-p42-shv-01-sjc2.fbcdn.net