Robtex

Up: 123.185.0.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 123.185.64.0/19
Down right: 123.185.96.0/19

IP	Type	Hostname
123.185.64.64	PTR	64.64.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.67.185	A	sankegroup.com
123.185.67.185	A	sankehk.com
123.185.67.207	A	qmht.cn
123.185.67.209	A	mail.qmht.cn
123.185.67.211	A	dlgaoxinreli.com
123.185.67.249	A	dlsp.cn
123.185.75.64	PTR	64.75.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.77.2	PTR	2.77.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.77.64	PTR	64.77.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.78.194	PTR	194.78.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.80.195	PTR	195.80.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.87.1	PTR	1.87.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.87.130	PTR	130.87.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.88.221	A	momor.net
123.185.91.78	A	king.dynns.com
123.185.95.66	PTR	66.95.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.95.129	PTR	129.95.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.95.130	PTR	130.95.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.99.3	PTR	3.99.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.105.153	A	zhmtsh.com
123.185.110.195	PTR	195.110.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.110.206	A	www.vlai.org
123.185.113.128	PTR	128.113.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.120.129	PTR	129.120.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.122.131	PTR	131.122.185.123.broad.dl.ln.dynamic.163data.com.cn
123.185.127.131	PTR	131.127.185.123.broad.dl.ln.dynamic.163data.com.cn