Robtex

Up: 203.81.48.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.81.52.0/23
Down right: 203.81.54.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.81.52.155	PTR	ns1494.ztomy.com
203.81.53.4	A	www.pqs-engr.com
203.81.53.5	A	www.pqs-engr.com
203.81.53.14	A	mail.nlbconference.com
203.81.53.14	A	drmartens.com.sg
203.81.53.28	PTR	mail.creditinnovate.com
203.81.53.38	PTR	sandbox.synergies.com.sg
203.81.53.38	A	ourchoice.biz
203.81.53.38	A	ara.com.hk
203.81.53.46	A	gakuse.com
203.81.53.46	A	theactionscriptconference.com
203.81.53.83	A	ns1.registerevent.com
203.81.53.84	PTR	eworld.com.sg
203.81.53.86	A	ns2.registerevent.com
203.81.53.90	PTR	ns5.faithost.com
203.81.53.90	A	mail.aifms.com
203.81.53.93	PTR	ns1.faithost.com
203.81.53.99	PTR	ns2.dfinehub.net
203.81.53.99	A	ns1.btlights.com
203.81.53.99	A	ns2.cowinabox.com
203.81.53.103	PTR	ns1.dfinehub.net
203.81.53.194	PTR	ps.nic.net.sg
203.81.53.194	PTR	ws.nic.net.sg
203.81.53.226	PTR	jasonthefrog.com
203.81.53.227	PTR	mirror.wired2win.biz
203.81.53.227	A	imedeen.com.my
203.81.53.229	A	simplypentaxyl.com
203.81.54.39	A	antispam.luxasia.com
203.81.54.39	A	cleanmail-04-01-service.mailranger.com
203.81.54.68	A	www.sato-int.com
203.81.54.68	A	*.barcodesato.com
203.81.54.68	A	barcodesato.com
203.81.54.70	A	www.rgmi.com
203.81.55.3	A	kaichi.com.sg
203.81.55.3	A	stone-consultant.com
203.81.55.4	PTR	sushi1.corp8.com
203.81.55.4	A	pop.subway.sg
203.81.55.4	A	mail.coloasia.com
203.81.55.29	PTR	unknown.8toinfinity.com.sg
203.81.55.33	PTR	unknown.8toinfinity.com.sg
203.81.55.33	A	ns1.yello.com.sg
203.81.55.33	A	mail.yello.com.sg
203.81.55.132	PTR	ns2.faithost.com
203.81.55.145	PTR	srv1.enterprise-sw.com
203.81.55.153	A	asol.vmtechsolutions.biz
203.81.55.156	A	hammermail.com
203.81.55.161	PTR	server.themeetinglab.com
203.81.55.201	PTR	jireh.com.sg