Robtex

Up: 171.12.0.0/15
Can't show all results, try to descend to a more specific CIDR
Down left: 171.13.0.0/17
Down right: 171.13.128.0/17

IP	Type	Hostname
171.13.6.2	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.14.0	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.14.1	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.14.2	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.14.3	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.14.66	A	s.360.cn
171.13.14.97	A	open.qurl.f.qh-lb.com
171.13.14.100	A	tb-dl1.yunpan.360.cn
171.13.14.103	A	netlab.360.com
171.13.25.2	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.29.94	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.29.110	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.38.137	A	kf26.cn
171.13.38.185	A	se13se.net
171.13.38.185	A	kfszsb.com
171.13.38.185	A	5bbhh.com
171.13.60.118	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.103.131	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.112.229	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.117.161	A	mxuan.net
171.13.138.228	A	shisanxiang.cn
171.13.139.49	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.160.127	A	8682558.com
171.13.169.109	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.182.5	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.185.180	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.188.60	A	mail.gpqu.com
171.13.188.141	A	mail.yaozhuna.com
171.13.197.182	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.216.180	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.217.202	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.235.8	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.241.135	PTR	13.171.broad.ha.dynamic.163data.com.cn
171.13.243.157	A	azlxw.com