Robtex

Up: 212.57.24.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 212.57.28.0/23
Down right: 212.57.30.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
212.57.28.91	A	akcansabflex.com
212.57.28.122	PTR	host-212-57-28-122.reverse.superonline.net
212.57.28.123	A+PTR	exchange.akcansa.com.tr
212.57.28.123	A	mail.akcansabflex.com
212.57.28.146	PTR	host-212-57-28-146.reverse.superonline.net
212.57.28.175	A	mail2.fnctarim.com.tr
212.57.28.186	A	mail.iletisimyazilim.net
212.57.28.235	PTR	asy235.asy28.tellcom.com.tr
212.57.28.235	A	ns.bilimmakina.com.tr
212.57.28.235	A	www.bilimmakina.com.tr
212.57.29.9	A	teknosatransfer.com
212.57.29.9	A	mail.teknosatransfer.com
212.57.29.30	PTR	asy30.asy29.tellcom.com.tr
212.57.29.30	A	yatirimci.teknosa.com
212.57.29.69	PTR	asy69.asy29.tellcom.com.tr
212.57.29.69	A	teknosadestek.com.tr
212.57.29.69	A	teknosaasist.com.tr
212.57.29.91	A	dev.teknosa.com
212.57.29.98	PTR	smtp.calista.com.tr
212.57.29.98	A	mail.calista.com.tr
212.57.29.98	A	mail.kenet.com.tr
212.57.29.99	PTR	host-212-57-29-99.reverse.superonline.net
212.57.29.100	PTR	host-212-57-29-100.reverse.superonline.net
212.57.29.103	PTR	host-212-57-29-103.reverse.superonline.net
212.57.29.116	PTR	host-212-57-29-116.reverse.superonline.net
212.57.29.116	A	karantina.teknosa.com
212.57.29.150	A	mail.egeraspa.com
212.57.29.158	PTR	asy158.asy29.tellcom.com.tr
212.57.29.158	A	ns3.stm.com.tr
212.57.29.178	PTR	asy178.asy29.tellcom.com.tr
212.57.29.186	PTR	asy186.asy29.tellcom.com.tr
212.57.29.214	A	ilkecell.com.tr
212.57.29.218	PTR	host-212-57-29-218.reverse.superonline.net
212.57.29.242	PTR	asy242.asy29.tellcom.com.tr
212.57.30.4	A+PTR	smtp4.superonline.com
212.57.30.8	A+PTR	smtp8.superonline.com
212.57.30.11	A+PTR	smtp11.superonline.com
212.57.30.15	A+PTR	smtp15.superonline.com
212.57.30.42	PTR	asy42.asy30.tellcom.com.tr
212.57.30.255	PTR	asy255.asy30.tellcom.com.tr
212.57.31.100	PTR	host-212-57-31-100.reverse.superonline.net