Robtex

Up: 203.126.136.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 203.126.140.0/23
Down right: 203.126.142.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
203.126.140.4	PTR	mail.advanex.com.sg
203.126.140.11	PTR	mail.aeca.com.sg
203.126.140.11	PTR	mail.kato.com.sg
203.126.140.11	A	mail.advanex.com.sg
203.126.140.27	A	smtp.carlsberg.com.sg
203.126.140.133	PTR	mail3.upek.com
203.126.140.147	A+PTR	sgwldln00.metalformasia.com
203.126.141.34	A	virgin-asia.virgin-asiapacific.com
203.126.141.34	A	virgin-asiapacific.com
203.126.141.43	A	webcsm.com
203.126.141.43	A	www.webcsm.com
203.126.141.46	A	ftp.pdl123.com.sg
203.126.141.52	A	mail.bdpsg.com
203.126.141.53	PTR	bdpweb.bdpap.com
203.126.141.53	A	www.bdpap.com
203.126.141.53	A	www.bdphk.com
203.126.141.73	A+PTR	mail.goviex.com
203.126.141.73	A	mail.ibexresources.com
203.126.141.75	A+PTR	mail-e1.ivancorp.net
203.126.141.77	A+PTR	mail-e2.ivancorp.net
203.126.141.79	PTR	mailnew-e2.ivancorp.net
203.126.141.84	A	ivancorp.net
203.126.141.84	A	www.ivancorp.net
203.126.141.95	A	ivanshare.net
203.126.141.163	A	im.internationalsos.com
203.126.141.170	A	sinvpn.internationalsos.com
203.126.142.34	A	technicfs1.technic.com.sg
203.126.142.34	A	technic.com.sg
203.126.142.40	A+PTR	mail.technic.com.sg
203.126.142.66	A	bdcserver.ols.com.sg
203.126.142.66	A	www.ols.com.sg
203.126.142.67	A+PTR	mail.ols.com.sg
203.126.142.68	PTR	mail.ols.com.sg
203.126.142.68	A	mail1.ols.com.sg
203.126.142.194	A+PTR	mail.yml.com.sg
203.126.142.195	A	www.yml.com.sg
203.126.142.196	A+PTR	mail1.yml.com.sg
203.126.142.236	A	scbaprssxmrla.sg.standardchartered.com