Robtex

Up: 84.51.16.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 84.51.18.0/24
Down right: 84.51.19.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
84.51.18.2	PTR	mail.ideamc.com
84.51.18.2	A	alargakumanyacilik.com
84.51.18.3	PTR	mail.kariyerkitap.com
84.51.18.4	PTR	mail.ideamc.com
84.51.18.6	PTR	mail.ideamc.com
84.51.18.10	A	www.efiyat.com.tr
84.51.18.21	PTR	mail.cansan.com.tr
84.51.18.27	A	sip.konuskanhat.com
84.51.18.38	A	mail.forceclamps.com
84.51.18.77	PTR	host-84-51-18-77.teletektelekom.com
84.51.18.82	PTR	host-84-51-18-82.teletektelekom.com
84.51.18.85	A	ns1.merdeniz.net
84.51.18.90	PTR	mail.mesaj160.info
84.51.18.90	A	mail.web2mobil.net
84.51.18.90	A	mesaj160.com
84.51.18.101	A+PTR	mail.cemsa.net
84.51.18.101	A	mail.turbedar.net
84.51.18.101	A	mail.spideretms.com
84.51.18.102	PTR	host-84-51-18-102.teletektelekom.com
84.51.18.102	A	corakci.com
84.51.18.102	A	spideretms.com
84.51.18.105	PTR	mail.dogalilac.com
84.51.18.105	A	varlikistanbul.com
84.51.18.105	A	lushtasarim.com
84.51.18.130	PTR	host-84-51-18-130.teletektelekom.com
84.51.18.130	A	www.teknobil.com.tr
84.51.18.130	A	dns.teknobil.com.tr
84.51.18.134	A	tracking.mobi-net.com.tr
84.51.18.134	A	mail.tracking.mobi-net.com.tr
84.51.18.156	A	www.isvts.com
84.51.18.163	PTR	host-84-51-18-163.teletektelekom.com
84.51.18.163	A	mail.memlekethaber.com
84.51.18.178	PTR	ns1.pronsa.com
84.51.18.179	PTR	ns2.pronsa.com
84.51.18.196	PTR	host-84-51-18-196.teletektelekom.com
84.51.18.202	PTR	tif.org.tr
84.51.18.203	PTR	mail.halla.com.tr
84.51.18.203	PTR	mail.visteon.com.tr
84.51.18.216	PTR	host-84-51-18-216.teletektelekom.com
84.51.18.224	PTR	host-84-51-18-224.teletektelekom.com
84.51.18.226	PTR	host-84-51-18-226.teletektelekom.com
84.51.18.226	A	mail.galatimall.com
84.51.18.226	A	mail.kupa.net
84.51.18.234	PTR	mail.netronhosting.com
84.51.18.234	A	www.histas.com
84.51.18.234	A	histas.com
84.51.19.11	PTR	mail.bilgihost.com
84.51.19.17	PTR	host-84-51-19-17.teletektelekom.com
84.51.19.20	PTR	host-84-51-19-20.teletektelekom.com
84.51.19.20	A	caspercenter.com
84.51.19.20	A	hemenalisveris.com
84.51.19.145	PTR	host-84-51-19-145.teletektelekom.com
84.51.19.191	PTR	host-84-51-19-191.teletektelekom.com