Robtex

Up: 212.57.16.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 212.57.16.0/23
Down right: 212.57.18.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.57.16.1	PTR	asy1.asy16.tellcom.com.tr
212.57.16.11	PTR	asy11.asy16.tellcom.com.tr
212.57.16.56	PTR	host-212-57-16-56.reverse.superonline.net
212.57.16.56	A	smtp.remax-turkey.com
212.57.16.78	PTR	asy78.asy16.tellcom.com.tr
212.57.16.78	A	mail.nezih.com.tr
212.57.16.90	PTR	mail.teknoparkistanbul.com.tr
212.57.16.114	PTR	asy114.asy16.tellcom.com.tr
212.57.16.146	PTR	host-212-57-16-146.reverse.superonline.net
212.57.16.150	PTR	host-212-57-16-150.reverse.superonline.net
212.57.16.150	A	sezin.k12.tr
212.57.16.150	A	www.okulogic.com
212.57.16.165	A	img.teknosa.com
212.57.16.166	PTR	host-212-57-16-166.reverse.superonline.net
212.57.16.166	A	kliksa.com.tr
212.57.16.166	A	www.kliksa.com
212.57.16.184	A	www.teknosa.tc
212.57.16.184	A	teknosa.tc
212.57.16.188	PTR	asy188.asy16.tellcom.com.tr
212.57.16.188	A	iskenderun.iklimsa.com
212.57.16.194	PTR	mail.tadim.com.tr
212.57.16.246	A	nextstarmarket.com
212.57.16.250	PTR	next.com.tr
212.57.16.250	PTR	b.next.com.tr
212.57.16.250	PTR	mail.next.com.tr
212.57.17.3	PTR	asy3.asy17.tellcom.com.tr
212.57.17.10	PTR	host-212-57-17-10.reverse.superonline.net
212.57.17.34	PTR	host-212-57-17-34.reverse.superonline.net
212.57.17.66	PTR	host-212-57-17-66.reverse.superonline.net
212.57.17.67	PTR	host-212-57-17-67.reverse.superonline.net
212.57.17.67	A	ns01.kultur.k12.tr
212.57.17.67	A	ns02.kultur.k12.tr
212.57.17.68	A+PTR	webmail.kultur.k12.tr
212.57.17.69	A+PTR	norton.kultur.k12.tr
212.57.17.70	A	okulnet.kultur.k12.tr
212.57.17.83	A+PTR	kionya.inanmakina.com
212.57.17.98	PTR	host-212-57-17-98.reverse.superonline.net
212.57.17.100	PTR	host-212-57-17-100.reverse.superonline.net
212.57.17.100	A	ns2.iskoop.org
212.57.17.101	PTR	iskoop.org
212.57.17.101	A+PTR	mx.iskoop.org
212.57.17.101	A	mail.iskoop.org
212.57.17.102	A	www.iskoop.org
212.57.17.106	PTR	asy106.asy17.tellcom.com.tr
212.57.17.106	A	timesaat.com
212.57.17.115	PTR	host-212-57-17-115.reverse.superonline.net
212.57.17.125	A+PTR	mail.kadifeteks.com
212.57.17.126	A	mail.rehaerdag.com
212.57.17.145	PTR	host-212-57-17-145.reverse.superonline.net
212.57.17.146	PTR	host-212-57-17-146.reverse.superonline.net
212.57.17.149	PTR	host-212-57-17-149.reverse.superonline.net
212.57.17.154	PTR	mailgw2.ekofms.com
212.57.17.154	A+PTR	mailgw2.suzer.com
212.57.17.154	A+PTR	mailgw2.kentfactoring.com.tr
212.57.17.162	PTR	host-212-57-17-162.reverse.superonline.net
212.57.17.186	PTR	host-212-57-17-186.reverse.superonline.net
212.57.17.195	PTR	mail.bogazici.com.tr
212.57.17.202	A+PTR	mx1.formgroup.com
212.57.17.202	A	mx1.formsolar.com
212.57.17.202	A	mail.formsolar.com
212.57.17.229	PTR	asy229.asy17.tellcom.com.tr
212.57.17.229	A	basari-textile.com
212.57.17.229	A	mx.glassmaker.org
212.57.17.231	PTR	asy231.asy17.tellcom.com.tr
212.57.17.235	A	mx.reportback.ca
212.57.17.235	A	bizimsokak.com
212.57.18.5	PTR	host-212-57-18-5.reverse.superonline.net
212.57.18.14	PTR	host-212-57-18-14.reverse.superonline.net
212.57.18.14	A	avivasigorta.com.tr
212.57.18.14	A	www.avivasigorta.com.tr
212.57.18.16	PTR	posta.avivasigorta.com.tr
212.57.18.34	PTR	host-212-57-18-34.reverse.superonline.net
212.57.18.34	A	smtp.aviva.com.tr
212.57.18.50	PTR	posta.avivasigorta.com.tr
212.57.18.66	PTR	host-212-57-18-66.reverse.superonline.net
212.57.18.66	A	ns1.teknikgumruk.com
212.57.18.66	A	ns2.teknikgumruk.com
212.57.18.67	PTR	host-212-57-18-67.reverse.superonline.net
212.57.18.83	A	sir724.com
212.57.18.109	PTR	host-212-57-18-109.reverse.superonline.net
212.57.18.109	A	eksenbilgisayar.com
212.57.18.110	PTR	mail.eksenbilgisayar.com
212.57.18.118	PTR	mail.vispartners.com
212.57.18.118	A	mx.viscloud.com
212.57.18.132	A	temeltransport.com.tr
212.57.18.195	A	ns2.escsaatteknik.com
212.57.18.195	A	ns1.escsaatteknik.com
212.57.19.10	PTR	asy10.asy19.tellcom.com.tr
212.57.19.18	PTR	asy18.asy19.tellcom.com.tr
212.57.19.34	A+PTR	mail.dogafaktoring.com.tr
212.57.19.54	PTR	mail.cyberpark.com.tr
212.57.19.67	PTR	host-212-57-19-67.reverse.superonline.net
212.57.19.67	A	osmannihaterkan.com
212.57.19.90	PTR	asy90.asy19.tellcom.com.tr
212.57.19.170	PTR	host-212-57-19-170.reverse.superonline.net
212.57.19.242	PTR	asy242.asy19.tellcom.com.tr