Robtex

Up: 58.185.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 58.185.0.0/20
Down right: 58.185.16.0/20
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
58.185.0.66	PTR	mx1.orix-rentec.com.sg
58.185.0.68	PTR	orsms01.orix-rentec.com.sg
58.185.0.71	A	orsdc02.orix-rentec.com.sg
58.185.0.102	A+PTR	mailgate01.starconcord.com.sg
58.185.1.1	PTR	mail.g8education.edu.sg
58.185.1.167	A	sg.apac.aiab.net
58.185.2.35	A	seascoutsofsingapore.org
58.185.2.36	A	thep1club.com
58.185.2.37	A	p1powerboats.com
58.185.2.37	A	www.p1powerboats.com
58.185.2.65	PTR	mx22.aimsds.net
58.185.2.66	PTR	ns1.aimsds.com
58.185.2.68	PTR	ns2.aimsds.com
58.185.2.166	A	maildr.nagase.com.sg
58.185.2.211	A	www.lawsoc.org.sg
58.185.2.212	A+PTR	lawsoc-dns.lawsoc.org.sg
58.185.2.214	A+PTR	mail.lawsoc.org.sg
58.185.2.216	A	webmail.lawsoc.org.sg
58.185.3.13	A+PTR	shhkex.shhks.com
58.185.3.13	A	ibmserver.shhks.com
58.185.3.242	A	smtp.conscendo.com.sg
58.185.4.3	A	safyc.org.sg
58.185.4.44	A	sswimclub.org.sg
58.185.4.44	A	*.sswimclub.org.sg
58.185.4.44	A	mx.sswimclub.org.sg
58.185.4.154	A+PTR	mailhost.phgroup.com.sg
58.185.4.154	A	mailhost.spir.sg
58.185.4.155	A+PTR	phemail.phgroup.com.sg
58.185.4.198	A	duriancloud.com
58.185.4.203	A	mx.veoliawater.sg
58.185.5.68	PTR	pop.apresmarketing.com
58.185.5.68	PTR	smtp.apresmarketing.com
58.185.5.68	PTR	pop.imailhub.com
58.185.5.99	A	www.tmc-sin.com.sg
58.185.5.201	A	mail.sodick.com.sg
58.185.5.202	PTR	pusher.sodick.com.sg
58.185.5.203	A+PTR	dns.sodick.com.sg
58.185.6.35	PTR	mail.iyerpractice.com
58.185.6.36	A	mail.singtrust.com
58.185.6.41	A+PTR	mail.iyerpractice.com
58.185.6.211	A	jkis.com.sg
58.185.7.15	PTR	sgspam.ardentec.com
58.185.7.15	A	sgns1.ardentec.com
58.185.7.15	A	ns.ardentec.com.sg
58.185.7.26	A	www.ardentec.com.sg
58.185.7.53	A	mail.wisol.com.sg
58.185.7.55	A	mail.wisol.com.sg
58.185.7.55	A	www.wisol.com.sg
58.185.7.55	A	wisol.com.sg
58.185.7.56	A	denetron.com.sg
58.185.7.81	PTR	mail.aceford.com.sg
58.185.7.163	PTR	mail.creativetours.com.sg
58.185.8.84	A	mqcoms.com
58.185.8.130	PTR	mail.bilseagroup.com
58.185.8.130	A	mail.bilxin.com
58.185.8.130	A	mail.seabridge-bunkering.com
58.185.8.227	A	siaec-fmp.com
58.185.8.230	A	survey.singaporeair.com
58.185.8.232	A	sq-rss.com.sg
58.185.8.232	A	www.sq-rss.com.sg
58.185.10.122	PTR	mail.jlmould.com
58.185.10.133	A	cosbulkcm.com
58.185.11.53	PTR	webmail.fineliving.com.sg
58.185.11.53	PTR	webmail.leathermaster.com.sg
58.185.11.53	PTR	webmail.mgc.com.sg
58.185.11.132	A+PTR	mail.tec-hub.com
58.185.11.132	A	mail.intercept-asia.com
58.185.11.162	A+PTR	home.yeos.com
58.185.11.168	A	ns1.yeos.com.hk
58.185.11.168	A	yeos.com.sg
58.185.11.168	A	ns2.yeoschina.com
58.185.11.243	A+PTR	mail.softenger.com
58.185.11.243	A	net.softenger.com
58.185.11.244	A	mail.softenger.com
58.185.11.244	A	smashgaps.com
58.185.11.244	A	mail.smashgaps.com
58.185.12.150	A	*.hcbtrust.net
58.185.12.150	A	imfortuna.com
58.185.12.150	A	nationalfed.com
58.185.12.152	A	www.img-fx.com
58.185.12.162	A+PTR	smtpgw.minebea.com.sg
58.185.12.163	A+PTR	psc003.minebea.com.sg
58.185.12.243	PTR	email.brother.com.sg
58.185.12.245	PTR	www.brother.com.sg
58.185.12.246	PTR	mail.brother.com.sg
58.185.12.250	A	brother.sg
58.185.12.250	A	www.brother.sg
58.185.13.149	A	pridns.kkh.com.sg
58.185.13.156	A+PTR	smtp2.kkh.com.sg
58.185.13.157	A+PTR	smtp1.kkh.com.sg
58.185.13.158	A	gateway.kkh.com.sg
58.185.13.177	A	ikeastore.com.sg
58.185.13.184	A	email.ikeastore.com.sg
58.185.13.211	PTR	mailgw.ishimaship.com
58.185.13.246	A	vdns1.ginga.com.sg
58.185.13.252	A	dojima-exchange.com
58.185.13.252	A	www.ginga.com.sg
58.185.13.254	A+PTR	mail.ginga.com.sg
58.185.15.142	A	ournoblelife.com
58.185.20.146	PTR	jchowe.com
58.185.22.158	A+PTR	ams.sg
58.185.22.210	A	pacificutama.com.sg
58.185.24.35	PTR	mail.d-ron.com
58.185.24.35	A	ns1.d-ron.com
58.185.24.39	PTR	mail.dronsgsvr02.com
58.185.24.39	A	ns1.dronsghost.com
58.185.24.40	PTR	mail.emtec-group.com.sg
58.185.24.92	A	blaster.glceventslist.com
58.185.24.93	A	blaster.glcconferences.com
58.185.24.93	A	glcconferences.com
58.185.24.118	A+PTR	smtp.kmp.com.sg
58.185.24.118	A	smtp.foodsymphony.com.sg
58.185.24.118	A	smtp.grandedelta.com
58.185.24.126	PTR	exchange.globaltronic.com.sg
58.185.24.163	A+PTR	yufish-es1.yufish.com
58.185.24.202	A	360mgt.dyndns.ws
58.185.25.81	A	aeas.org.sg
58.185.25.200	A+PTR	mail.mtqpremier.com.sg
58.185.25.202	PTR	mail.mtqpremier.com.sg
58.185.25.202	A	mail.mtqpemac.com.sg
58.185.25.211	PTR	ac.arbiter.com.sg
58.185.25.211	A	ae.arbiter.com.sg
58.185.26.35	A	fw.aimcorp.com.sg
58.185.26.36	A+PTR	smtp.aimcorp.com.sg
58.185.26.36	PTR	smtp.haomart.com.sg.26.185.58.in-addr.arpa
58.185.26.36	A	smtp.amcl.com.sg
58.185.26.148	A+PTR	mx02.nittan.com.sg
58.185.27.52	A	www.mslportal.edu.sg
58.185.27.222	A+PTR	mail.hongfok.com.sg
58.185.27.222	A	mail.concourse.com.sg
58.185.27.222	A	mail1.hongfok.com.sg
58.185.28.242	A	mail.sea-rich.com.sg
58.185.29.195	A+PTR	mail.wahjooseng.com
58.185.29.195	A	mail1.canhelp.biz
58.185.30.6	A+PTR	mail.axisengg.com
58.185.30.78	PTR	mail.psmpl.com.sg
58.185.30.78	A	www.psmpl.com.sg
58.185.30.78	A	mail.parakougroup.com.sg
58.185.30.131	A	www.asianshipper.com
58.185.30.163	A	ladasp.com
58.185.30.163	A	www.microndr.com
58.185.30.163	A	microndr.com.sg
58.185.30.165	A	ladasp.com
58.185.30.243	A+PTR	mail.nichibei.com.sg
58.185.30.246	A+PTR	webmail.nichibei.com.sg