Robtex

Up: 61.164.172.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 61.164.173.0/25
Down right: 61.164.173.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
61.164.173.27	PTR	27.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.29	PTR	29.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.38	PTR	38.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.59	PTR	59.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.79	PTR	79.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.90	PTR	90.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.91	A	rrr.youle55.com
61.164.173.91	A	cs.youle55.com
61.164.173.91	A	code.37cs.com
61.164.173.94	A	cs.youle55.com
61.164.173.94	A	rwq.youle55.com
61.164.173.94	A	d3d.3dwwwgame.com
61.164.173.100	PTR	100.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.100	A	www.sd2410.com
61.164.173.100	A	cwmob.com
61.164.173.110	PTR	110.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.121	PTR	121.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.127	PTR	127.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.140	PTR	140.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.145	A	youqudao.net
61.164.173.146	A	youqudao.mobi
61.164.173.146	A	*.youqudao.com
61.164.173.146	A	ecs46.youqudao.com
61.164.173.148	PTR	148.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.149	PTR	149.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.150	PTR	150.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.150	A	ecs50.86.net.cn
61.164.173.150	A	ecs50.youqudao.com
61.164.173.151	A	ecs51.youqudao.com
61.164.173.151	A	86.net.cn
61.164.173.166	A	sanhu.net
61.164.173.166	A	rongge.cn
61.164.173.179	PTR	179.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.193	PTR	193.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.196	A	mail.dacaijue.net
61.164.173.225	PTR	225.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.225	A	p.yocc.net
61.164.173.239	PTR	239.173.164.61.dial.wz.zj.dynamic.163data.com.cn
61.164.173.245	PTR	245.173.164.61.dial.wz.zj.dynamic.163data.com.cn