Robtex

Up: 113.20.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 113.20.20.0/23
Down right: 113.20.22.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
113.20.20.210	A	mail.indojilbab.net
113.20.21.66	A	dns2.ltssw.com
113.20.21.66	A	dns2.tang28.com
113.20.21.69	PTR	113-20-21-69.luckytone.hk
113.20.21.79	A	tang28.com
113.20.21.90	PTR	113-20-21-90.luckytone.hk
113.20.21.126	A	dns1.tang28.com
113.20.21.225	PTR	ns2.webasehk.com
113.20.21.231	A+PTR	ns2.10gtechnology.com
113.20.21.231	A	ns2.gowwf.com
113.20.21.231	A	ns2.on9.hosting
113.20.21.246	A+PTR	ns1.webasehk.com
113.20.21.247	PTR	113-20-21-247.luckytone.hk
113.20.21.247	A	mail.webasehk.com
113.20.21.247	A	mail.purplebutterfly.com.hk
113.20.22.7	A	ns2.max000.com