Robtex

Up: 58.185.200.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 58.185.204.0/23
Down right: 58.185.206.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
58.185.204.51	A+PTR	mail.hupsoon.com
58.185.204.51	A	hupsoon.com
58.185.204.66	A	dns2.wisenet.com.sg
58.185.204.68	A+PTR	mx2.wisenet.com.sg
58.185.204.69	A+PTR	mailcop.wisenet.com.sg
58.185.204.71	A	megawise.com.sg
58.185.204.72	A	kscomm-sg.com
58.185.204.72	A	www.airelatedtravel.com.sg
58.185.204.72	A	aviationservices.com.sg
58.185.204.76	A	webmail.wisenet.com.sg
58.185.204.84	A+PTR	mx1.wisenet.com.sg
58.185.204.151	A+PTR	mail.abwin.com.sg
58.185.205.3	A	www.volunteersingapore.com
58.185.205.3	A	volunteersingapore.com
58.185.205.4	A	www.healingfromhome.com
58.185.205.4	A	unitedbmec.com
58.185.205.4	A	bmecthai.com
58.185.205.6	A	unitedbmec.com
58.185.205.6	A	bmecthai.com
58.185.205.6	A	medisolution.com.sg
58.185.205.9	A	mail.unitedbmec.com
58.185.205.9	A	mail.medisolution.com.sg
58.185.205.9	A	mail.bmecthai.com
58.185.205.10	A	poweruprehab.com
58.185.205.147	A+PTR	ae.justit.com.sg
58.185.205.148	A	info.justit.com.sg
58.185.206.66	A	mail.galmon.com
58.185.206.68	A	rpcproxy.galmon.com
58.185.206.236	A	triventure.com.sg
58.185.206.236	A	mail.myserver01.com
58.185.206.236	A	myserver01.com
58.185.207.3	PTR	onenorthmedia.com
58.185.207.3	A	mail.automobilmanufactur.com.sg
58.185.207.130	A+PTR	mx1.antarius-is.com
58.185.207.132	A	campregistrationpage.com
58.185.207.136	A	mail.charismata-aesthetics.com
58.185.207.136	A	gwmail.cepl.com.sg
58.185.207.136	A	mx1.altronz.com
58.185.207.138	A	earth.amacnet.com
58.185.207.139	PTR	mail.antarius-is.com
58.185.207.148	A	svbh01.altronz.com
58.185.207.148	A	altronz.com
58.185.207.154	PTR	mx3.antarius-is.com
58.185.207.157	PTR	fgt60.antarius-is.com