Robtex

Up: 212.58.18.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 212.58.18.0/25
Down right: 212.58.18.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.58.18.0	PTR	net.doruk.net.tr
212.58.18.1	PTR	rev.1.18.58.212.doruk.net.tr
212.58.18.27	PTR	mail2.genmaras.com
212.58.18.29	PTR	mail.genmaras.com
212.58.18.34	PTR	mail.platogrup.com
212.58.18.58	A	guvencehesabi.com.tr
212.58.18.62	A	eski.tsrsb.org.tr
212.58.18.63	PTR	rev.63.18.58.212.doruk.net.tr
212.58.18.64	PTR	rev.64.18.58.212.doruk.net.tr
212.58.18.93	PTR	mail.hursigorta.com.tr
212.58.18.106	PTR	rev.106.18.58.212.doruk.net.tr
212.58.18.113	PTR	mail.unal.com.tr
212.58.18.124	PTR	rev.124.18.58.212.doruk.net.tr
212.58.18.124	A	mail2.czturk.com
212.58.18.130	PTR	rev.130.18.58.212.doruk.net.tr
212.58.18.157	PTR	rev.157.18.58.212.doruk.net.tr
212.58.18.172	PTR	webmail.embil.net
212.58.18.172	A	mail.embil.net
212.58.18.180	PTR	rev.180.18.58.212.doruk.net.tr
212.58.18.180	A	mail.secretcv.net
212.58.18.180	A	www.secretcv.com
212.58.18.184	A	mx.secretcv.net
212.58.18.195	A	mail.fudanismanlik.com
212.58.18.196	A+PTR	mail.fu.com.tr
212.58.18.196	A	fusrv.fu.com.tr
212.58.18.202	PTR	vdom.wispotter.doruk.net.tr
212.58.18.210	A+PTR	mail3.pekin.com.tr
212.58.18.210	A	mail3.pekin-bayar.av.tr
212.58.18.218	PTR	web.tetas.com.tr
212.58.18.226	PTR	mail.ehfinance.com
212.58.18.226	A	evrim.com
212.58.18.226	A	evrimyazilim.com
212.58.18.228	PTR	rev.228.18.58.212.doruk.net.tr
212.58.18.228	A	webgumruk.com
212.58.18.228	A	www.webgumruk.com
212.58.18.230	A	ticketsrv.evrimyazilim.com
212.58.18.233	PTR	rev.233.18.58.212.doruk.net.tr
212.58.18.233	A	websrv1.invenoa.com
212.58.18.233	A	ns2.idepark.com.tr
212.58.18.234	PTR	rev.234.18.58.212.doruk.net.tr
212.58.18.234	A	invenoa.com
212.58.18.236	A	medibook.com.tr
212.58.18.237	PTR	rev.237.18.58.212.doruk.net.tr
212.58.18.237	A	www.hipernex.com
212.58.18.237	A	hipernex.com
212.58.18.250	PTR	webmail.bluechip.com.tr
212.58.18.250	A	mail.bluechip.com.tr
212.58.18.255	PTR	bcast.doruk.net.tr