Robtex

Up: 203.81.56.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 203.81.56.0/24
Down right: 203.81.57.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.81.56.48	PTR	evolutionreg.com
203.81.56.66	PTR	gaming.bizwebasia.com
203.81.56.66	A	*.thundercity.org
203.81.56.66	A	irc.thundercity.org
203.81.56.70	PTR	www.bizwebhost.com.au
203.81.56.72	PTR	sg.bizwebasia.com
203.81.56.78	PTR	asiabizcomms.com
203.81.56.83	PTR	myfile.sg
203.81.56.86	PTR	mail.laxoglobal.com
203.81.56.87	PTR	ihost8.laxoglobal.net
203.81.56.98	PTR	qc.singhealth.com.sg
203.81.56.238	A	mail.alumexalliancegroup.com
203.81.56.238	A	mail.2elms.com.sg
203.81.56.238	A	pop.sichuandouhua.com
203.81.57.121	PTR	ns1.xetech.org