Robtex

Up: 212.15.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 212.15.16.0/22
Down right: 212.15.20.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.15.17.67	A+PTR	mail.el-bi.com
212.15.17.68	A	crm.el-bi.com
212.15.17.71	A	*.nillie.de
212.15.17.71	A	mail.lalunebaby.com
212.15.17.83	A+PTR	lotus.emdas.com.tr
212.15.18.3	A+PTR	admin.martmakina.com.tr
212.15.18.7	PTR	mail.luksbazaar.com
212.15.18.7	A+PTR	mail.halkali.com.tr
212.15.18.7	A+PTR	mail.hidrel.com.tr
212.15.18.8	A+PTR	posta.zaimogluholding.com
212.15.18.8	PTR	posta.zaimogluholding.com.tr
212.15.18.10	A	login.zaimogluholding.com.tr
212.15.18.50	A+PTR	mail.enkaokullari.k12.tr
212.15.18.50	A	mail.enkaschools.k12.tr
212.15.18.50	A	enkaschools.k12.tr
212.15.18.56	A	www.enkaokullari.k12.tr
212.15.18.56	A	enka.k12.tr
212.15.18.56	A	enkateknik.k12.tr
212.15.18.100	A	mail.selyak.com
212.15.18.101	A	totalyakitmatik.com
212.15.18.227	A+PTR	mail.eczacibasiportfoy.com
212.15.18.227	A+PTR	mail.emdas.com
212.15.18.227	A+PTR	mail.eczacibasiubp.com.tr
212.15.19.40	A+PTR	mail.unsa-tr.com
212.15.19.41	A	www.sunjut.com.tr
212.15.19.41	A	www.sunjut.com
212.15.19.41	A	sunjut.com
212.15.19.187	PTR	mail.genmaras.com
212.15.21.18	A+PTR	mail1.veritasmedia.com.tr
212.15.21.18	A	mail1.veritasmedya.com.tr
212.15.21.42	PTR	email.progida.com.tr
212.15.21.66	A	destekpatent.biz
212.15.21.66	A	kobipatent.net
212.15.21.66	A	mail.patsis.com.tr
212.15.21.67	PTR	mxgw.destekpatent.com.tr
212.15.21.70	PTR	mail.destekpatent.com.tr
212.15.21.72	A+PTR	mail.destekpatent.info
212.15.21.72	A	ns.destekpatent.info
212.15.21.72	A	ns.trust-gr.com
212.15.21.74	PTR	satilikmarkalar.com.tr
212.15.21.74	PTR	destekpatent.name.tr
212.15.21.74	PTR	destekpatent.web.tr
212.15.21.76	PTR	mail.destekpatent.com.tr
212.15.21.80	PTR	destekpatent.com.tr
212.15.21.80	A	mail3.destekglobal.net
212.15.21.81	PTR	markaizleme.net
212.15.21.81	PTR	mail.markaizleme.net
212.15.21.83	A	mail1.destekglobal.net
212.15.21.83	A	mail1.4444344.com
212.15.21.84	A+PTR	mail1.destekpatent.info
212.15.21.84	PTR	mail1.markaizleme.net
212.15.21.88	A+PTR	mail5.destekpatent.info
212.15.21.88	PTR	mail5.markaizleme.net
212.15.21.88	A	destekglobal.net
212.15.21.89	A+PTR	mail6.destekpatent.info
212.15.21.89	PTR	mail6.markaizleme.net
212.15.21.90	PTR	mail7.destekpatent.info
212.15.21.90	PTR	mail7.markaizleme.net
212.15.21.91	PTR	mail8.destekpatent.info
212.15.21.91	PTR	mail8.markaizleme.net
212.15.21.162	A	www.gima.com.tr
212.15.21.162	A	gima.com.tr
212.15.21.162	A	www.carrefourexpres.com
212.15.21.179	PTR	www.iem.gov.tr
212.15.21.180	PTR	mail.iem.gov.tr
212.15.21.183	PTR	ns1.iem.gov.tr
212.15.21.188	A	mxi1.adventinternational.com
212.15.21.196	PTR	mail.medline.com.tr
212.15.21.203	A+PTR	mail.atktekstil.com.tr
212.15.22.5	A	w.enka.com
212.15.22.5	A	enka.construction
212.15.22.6	A	mail2.enka.com
212.15.22.9	A	ts.enka.com
212.15.22.26	A+PTR	smtp2.enka.com
212.15.22.26	A	smtp2.enka.ru
212.15.22.26	A	smtpmos.enka.com
212.15.22.27	A	smtp4.enka.com
212.15.22.80	PTR	mail.kuralkan.com.tr
212.15.22.80	PTR	mail.sentimdestek.com.tr
212.15.22.130	PTR	mail.onduline.com.tr
212.15.22.131	PTR	ondusolar.com
212.15.22.131	PTR	www.ondusolar.com
212.15.22.131	PTR	onduline.com.tr
212.15.22.133	A+PTR	ftp.onduline.com.tr
212.15.22.158	A+PTR	mail1.onduline.com.tr
212.15.22.225	PTR	mail.namet.com.tr
212.15.22.227	PTR	mail.remax.com.tr
212.15.22.227	A	mail3.remax.com.tr
212.15.22.228	PTR	mail.namet.com.tr
212.15.22.241	PTR	mail.wall.com.tr