Robtex

Up: 31.13.96.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 31.13.104.0/22
Down right: 31.13.108.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.13.106.1	A	origincache-all.t.fbcdn.net
31.13.106.4	PTR	vupload2-shv-15-lla1.facebook.com
31.13.109.1	A	snaptu-d-shv-11-lla1.facebook.com
31.13.109.2	A+PTR	snaptu-za-shv-11-lla1.facebook.com
31.13.109.3	PTR	snaptu-da-shv-11-lla1.facebook.com
31.13.109.6	A	iorg-fba-shv-11-lla1.facebook.com
31.13.109.7	A	snaptu-service-proxy-shv-11-lla1.facebook.com
31.13.109.8	A	pushnotifs-shv-11-lla1.facebook.com
31.13.109.9	A	snaptu-t8-da-shv-11-lla1.facebook.com
31.13.109.10	A	snaptu-t8-za-shv-11-lla1.facebook.com
31.13.110.1	PTR	star-shv-12-lla1.facebook.com
31.13.110.2	A	436uc.com
31.13.110.3	A	gvlibrary.com
31.13.110.3	A	xawsj.com
31.13.110.3	A	wwwjb7891.com
31.13.110.11	A	njswsj.com
31.13.110.11	A	sunhorse.net
31.13.110.16	A	138cp555.com
31.13.110.16	A	alexispeacehall.com
31.13.110.16	A	823c.com.dingxingshengtai.com
31.13.110.32	A	localhost.admin.ltwsj.com
31.13.110.32	A	363668888.com
31.13.110.32	A	www.fywsj.com
31.13.110.40	A	8657799.com
31.13.110.40	A	www.beijing999.com.cn
31.13.110.40	A	983775.com
31.13.110.48	A	xpj123123.com
31.13.110.48	A	xincp555.com
31.13.111.2	A	t022666.com
31.13.111.2	A	2773775.com
31.13.111.8	A	*.portobranco25.tumblr.com.cn
31.13.111.8	A	089702.com
31.13.111.8	A	hu17744463775.com
31.13.111.9	A	gvlibrary.com
31.13.111.10	PTR	star-shv-01-lla2.facebook.com
31.13.111.11	PTR	www-connect-shv-01-lla2.facebook.com
31.13.111.36	A	87p555.com
31.13.111.36	A	3000ok.com.xw7.com
31.13.111.36	A	xn--nyq514ausaw23c.com
31.13.111.41	A	sxwrivslynonkj.www.yxsfwg.com
31.13.111.48	A	444301c.com
31.13.111.48	A	xn--fhq52khkz80bsmtpuuy70b.com