Robtex

Up: 203.185.56.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.185.56.0/23
Down right: 203.185.58.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.185.56.37	PTR	proxy1.zpub.incnets.com
203.185.56.37	A	mail.cyberport.corp.com.hk
203.185.56.37	A	bbmail.com.hk
203.185.56.38	PTR	proxy2.zpub.incnets.com
203.185.56.38	A	mail.cyberport.corp.com.hk
203.185.56.38	A	bbmail.com.hk
203.185.56.40	A+PTR	mtai11.zpub.incnets.com
203.185.56.40	A	mx1.cyberport.corp.com.hk
203.185.56.40	A	mail.bbmail.com.hk
203.185.56.41	PTR	mtai12.zpub.incnets.com
203.185.56.41	A	mx1.cyberport.corp.com.hk
203.185.56.41	A	mail.bbmail.com.hk
203.185.56.44	A+PTR	mtao11.zpub.incnets.com
203.185.56.44	A	mtao1.zpub.incnets.com
203.185.56.45	PTR	mtao12.zpub.incnets.com
203.185.56.45	A	mtao1.zpub.incnets.com
203.185.56.48	PTR	203185056048.static.ctinets.com
203.185.56.48	A	bbmail.com.hk
203.185.56.49	PTR	203185056049.static.ctinets.com
203.185.56.49	A	bbmail.com.hk
203.185.56.50	PTR	203185056050.static.ctinets.com
203.185.56.50	A	mail.bbmail.com.hk
203.185.56.51	PTR	mtai12n.zpub.incnets.com
203.185.56.51	A	mail.bbmail.com.hk
203.185.56.132	A	203185056132.static.ctinets.com
203.185.56.151	A	mcdwifi.y5zone.net
203.185.56.151	A	hotspot4.y5zone.net
203.185.56.152	PTR	203185056152.static.ctinets.com
203.185.56.152	A	wifi5.hkbn.net
203.185.56.156	PTR	203185056156.static.ctinets.com
203.185.56.156	A	www.y5zone.net
203.185.57.6	A+PTR	203185057006.res.dyn.ctinets.com
203.185.57.16	A+PTR	203185057016.res.dyn.ctinets.com
203.185.57.88	A	203185057088.res.dyn.ctinets.com
203.185.57.146	PTR	203185057146.res.dyn.ctinets.com
203.185.57.207	A	203185057207.res.dyn.ctinets.com
203.185.57.210	A	paulwong2003.com
203.185.57.233	A	mail.dark-lord.net
203.185.57.233	A	dark-lord.net
203.185.57.233	A	www.dark-lord.net
203.185.58.41	PTR	203185058041.res.dyn.ctinets.com
203.185.58.100	A	203185058100.res.dyn.ctinets.com
203.185.59.86	A	chinahongkonglimo.com
203.185.59.86	A	www.chinahongkonglimo.com