Robtex

Up: 58.185.32.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 58.185.40.0/22
Down right: 58.185.44.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
58.185.40.210	PTR	mail.arplc.com.sg
58.185.40.243	A+PTR	smtp.crystaltime.com.sg
58.185.40.243	A	smtp.crystaltime.com.my
58.185.41.60	A+PTR	mail.sif.org.sg
58.185.41.131	A	www.ibsingremit.sg
58.185.41.131	A	ibsingremit.sg
58.185.41.132	A	indianbank.sg
58.185.41.132	A	www.indianbank.sg
58.185.41.141	A	*.indianbank-singapore.com
58.185.41.141	A	mail.indianbank-singapore.com
58.185.41.141	A	indianbank-singapore.com
58.185.41.178	A	oe2.com.sg
58.185.41.198	PTR	mail.singaporeflyer.com
58.185.41.198	PTR	mailsvr.singaporeflyer.com
58.185.41.198	PTR	webmail.singaporeflyer.com
58.185.42.2	A	mail.asaholiday.com
58.185.42.67	A	pridns.asa.com.sg
58.185.43.196	A	www.omps.com.sg
58.185.43.229	A	ns1.eq-insurance.com.sg
58.185.43.232	A	www.eq-insurance.com.sg
58.185.44.18	PTR	mail.rubicon-offshore.com
58.185.44.53	A	mail.citic.com.sg
58.185.44.54	A	remote.citic.com.sg
58.185.44.162	PTR	heart4asia.net
58.185.44.164	A+PTR	mail.heart4asia.net
58.185.44.165	A+PTR	mail.omfmail.com
58.185.44.165	A	www.omfmail.com
58.185.44.165	A	*.omfmail.com
58.185.44.174	PTR	omfmail.com
58.185.44.175	PTR	omfmail.com
58.185.45.23	A	lantro.com.sg
58.185.45.100	A	mail.chutex.com.sg
58.185.45.146	A	parent-teacher.com
58.185.45.146	A	vectravli8.parent-teacher.com
58.185.45.147	A+PTR	mx.eximfr.com.sg
58.185.45.148	A	mail.eximfr.com.sg
58.185.45.218	A	sgsmartlearners.com
58.185.46.129	A	sg.pagenation.com
58.185.46.129	A	id.pagenation.com
58.185.46.129	A	my.pagenation.com
58.185.46.187	A	eaglewingscinematics.com.sg
58.185.46.195	A	mail.mbc.com.my
58.185.46.212	A	ebooking.temasekclub.org.sg
58.185.47.37	PTR	mail.btrts.org.sg
58.185.47.84	PTR	mbox.eurekahedge.com
58.185.47.105	A	mail1.sagatreecap.com
58.185.47.105	A	mail1.sagatreecapital.com
58.185.47.178	A	mail.gfsfilter.com
58.185.47.178	A	mail.scsunmicron.com
58.185.47.178	A	smtp2.gfsfilter.com