Robtex

Up: 203.186.12.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 203.186.12.0/24
Down right: 203.186.13.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.186.12.106	A	smtp.weixinrenai.com
203.186.12.106	A	imap.weixinrenai.com
203.186.12.106	A	mail.weixinrenai.com
203.186.12.181	PTR	203186012181.static.ctinets.com
203.186.12.181	A	www.locktao.edu.hk
203.186.12.194	A	mail.fecel.com.hk
203.186.13.98	A	mail.yemule.com
203.186.13.100	A	www.hkyoula.com
203.186.13.100	A	hkyoula.com
203.186.13.137	PTR	pacifictop.com.hk
203.186.13.161	A+PTR	mailin.nissinfoods.com.hk
203.186.13.161	PTR	mailin.nissinkoikeya.com.hk
203.186.13.161	A	mailin.nissinfoods.org
203.186.13.166	A	mail.nissinfoods.com.hk
203.186.13.218	PTR	203186013218.static.ctinets.com
203.186.13.218	A	mail.idsdg.com.hk
203.186.13.220	PTR	203186013220.static.ctinets.com
203.186.13.220	A	idsdg.com.hk
203.186.13.230	PTR	203186013230.static.ctinets.com
203.186.13.230	A	ns1.huacomm.com
203.186.13.231	PTR	203186013231.static.ctinets.com
203.186.13.231	A	www.huacomm.com
203.186.13.231	A	ns2.huacomm.com
203.186.13.239	A+PTR	203186013239.static.ctinets.com
203.186.13.239	A	webmail.huacomm.com
203.186.13.239	A	smtp.huacomm.com