Robtex

Up: 31.13.68.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 31.13.68.0/25
Down right: 31.13.68.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.13.68.1	PTR	edge-star-shv-03-xsp1.facebook.com
31.13.68.1	A	q45u.com
31.13.68.1	A	sx6677.com
31.13.68.2	A+PTR	edge-atlas-shv-01-icn1.facebook.com
31.13.68.2	A	hxvpnw.com
31.13.68.2	A	find2world.com
31.13.68.3	PTR	perfedge-m-shv-01-hkg1.facebook.com
31.13.68.3	A	edge-extern-shv-01-icn1.facebook.com
31.13.68.4	A	edge-cryptossl-shv-01-icn1.facebook.com
31.13.68.5	PTR	edge-z-shv-01-hkg1.facebook.com
31.13.68.5	A	tls13.vvv.facebook.com
31.13.68.7	A+PTR	edge-mqtt-shv-01-icn1.facebook.com
31.13.68.8	PTR	livestream-edgetee-upload-shv-01-icn1.facebook.com
31.13.68.8	A	xgwsj.com
31.13.68.8	A	19002.xxkk.net
31.13.68.9	PTR	livestream-edgetee-upload-staging-shv-03-xsp1.facebook.com
31.13.68.9	A	edge-secure-shv-01-icn1.facebook.com
31.13.68.9	A	hlgwsj.com
31.13.68.10	A+PTR	edge-snaptu-http-p1-shv-01-icn1.facebook.com
31.13.68.12	A+PTR	edge-star-shv-01-icn1.facebook.com
31.13.68.12	A	hwsj.com
31.13.68.13	PTR	xx-fbcdn-shv-03-xsp1.fbcdn.net
31.13.68.13	A	video-icn1-1.xx.fbcdn.net
31.13.68.13	A	video-icn.xx.fbcdn.net
31.13.68.14	A	xccp555.com
31.13.68.14	A	5323c.com
31.13.68.14	A	xn--fhq266etlaw23c.com
31.13.68.16	A	f7140095080kdbudr5q-wqyyqkub1483473485-sonar.xz.fbcdn.net
31.13.68.16	A	f3a4e8b7280kirbkkyq-iquvbrnj1490883224-sonar.xx.fbcdn.net
31.13.68.16	A	fe7d7eee880kz2xm2li-boxuledv1496545837-sonar.xx.fbcdn.net
31.13.68.17	PTR	edge-msgr-latest-shv-03-xsp1.facebook.com
31.13.68.17	A	greenvvv.com
31.13.68.17	A	game456999.com
31.13.68.18	PTR	edge-z-p1-shv-03-xsp1.facebook.com
31.13.68.18	A	shvpn5.com
31.13.68.18	A	www.sf54.com
31.13.68.19	PTR	perfedge-m-shv-02-hkg1.facebook.com
31.13.68.19	A	779702.com
31.13.68.19	A	mail.bottegavenetaoutletsale.tumblr.com.cn
31.13.68.20	A	fudawh.com
31.13.68.20	A	www.51cqkk.win
31.13.68.20	A	feixunv.com
31.13.68.21	PTR	edge-z-shv-02-hkg1.facebook.com
31.13.68.21	A	feiyulianvpn.com
31.13.68.21	A	edge-livestream-api-upload-shv-01-icn1.facebook.com
31.13.68.22	PTR	edge-extern-shv-03-xsp1.facebook.com
31.13.68.22	A	15241441919.com
31.13.68.22	A	563645.com
31.13.68.26	A+PTR	edge-shortwave-shv-01-icn1.facebook.com
31.13.68.32	A	edge-mqtt-mini-shv-01-icn1.facebook.com
31.13.68.33	PTR	edge-star-shv-03-hkg1.facebook.com
31.13.68.33	A	edge-snaptu-http-mini-shv-01-icn1.facebook.com
31.13.68.34	PTR	edge-sonar-mini-shv-01-icn1.fbcdn.net
31.13.68.34	A	f020a1efb80-fxvtjpoi1547861184-sonar.xx.fbcdn.net
31.13.68.34	A	fec09e8c980kyoji6qy-pcpftcnj1525850925-sonar.xz.fbcdn.net
31.13.68.35	PTR	edge-star-mini-shv-03-xsp1.facebook.com
31.13.68.35	A	arcliu.com
31.13.68.35	A	www.333pk.com
31.13.68.36	A+PTR	edge-z-m-mini-shv-01-icn1.facebook.com
31.13.68.36	A	0523c.com
31.13.68.36	A	wwwjing8444.com
31.13.68.37	A+PTR	edge-z-shv-03-hkg1.facebook.com
31.13.68.37	A	edge-z-mini-shv-01-icn1.facebook.com
31.13.68.38	PTR	iorg-fba-edge-shv-03-xsp1.facebook.com
31.13.68.38	A	edge-z-m-shv-03-hkg1.facebook.com
31.13.68.38	A	z-m-scontent-icn.xx.fbcdn.net
31.13.68.39	A	iorg-fba-edge-shv-01-icn1.facebook.com
31.13.68.41	A	edge-snaptu-http-p2-shv-01-icn1.facebook.com
31.13.68.42	PTR	edge-z-1-p2-shv-01-icn1.facebook.com
31.13.68.42	A	z-1-scontent-icn.xx.fbcdn.net
31.13.68.42	A	www.bjn188.com
31.13.68.49	A+PTR	edge-star-shv-04-hkg1.facebook.com
31.13.68.50	PTR	edge-m-shv-04-hkg1.facebook.com
31.13.68.50	A	edgeray-shv-01-icn1.facebook.com
31.13.68.51	PTR	edge-xwf-p3-shv-03-xsp1.facebook.com
31.13.68.51	A	scontent-icn1-1.cdninstagram.com
31.13.68.51	A	instagram-p3-shv-01-icn1.fbcdn.net
31.13.68.52	PTR	edgeray-msgr-shv-03-xsp1.facebook.com
31.13.68.52	A	w638914471khydpind-gm4tknbshe3damzu.snr.whatsapp.net
31.13.68.52	A	whatsapp-cdn-shv-01-icn1.fbcdn.net
31.13.68.53	PTR	wit-edge-shv-03-xsp1.facebook.com
31.13.68.53	A	xn--3zv423c.com
31.13.68.53	A	www.999cq.com
31.13.68.54	A+PTR	edge-turnservice-shv-01-icn1.facebook.com
31.13.68.56	A	xx-fbcdn-shv-04-hkg1.fbcdn.net
31.13.68.60	PTR	whatsapp-cdn-shv-03-xsp1.fbcdn.net
31.13.68.62	PTR	edgeray-shv-03-xsp1.facebook.com
31.13.68.63	A+PTR	instagram-p3-shv-03-xsp1.fbcdn.net
31.13.68.70	A	edge-star-shv-01-hkg2.facebook.com
31.13.68.84	A+PTR	edge-star-shv-02-hkg2.facebook.com
31.13.68.87	A+PTR	edge-z-m-shv-02-hkg2.facebook.com
31.13.68.89	A+PTR	xx-fbcdn-shv-02-hkg2.fbcdn.net
31.13.68.169	A+PTR	edge-z-p4-shv-01-icn1.facebook.com
31.13.68.172	PTR	instagram-p4-shv-03-xsp1.fbcdn.net
31.13.68.174	A+PTR	instagram-p42-shv-01-icn1.fbcdn.net
31.13.68.174	A	z-p42-scontent-icn1-1.cdninstagram.com