Robtex

Up: 84.51.44.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 84.51.46.0/24
Down right: 84.51.47.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
84.51.46.56	PTR	host-84-51-46-56.teletektelekom.com
84.51.46.61	PTR	host-84-51-46-61.teletektelekom.com
84.51.46.71	PTR	host-84-51-46-71.teletektelekom.com
84.51.46.88	PTR	host-84-51-46-88.teletektelekom.com
84.51.46.102	PTR	host-84-51-46-102.teletektelekom.com
84.51.46.130	PTR	host-84-51-46-130.teletektelekom.com
84.51.46.164	PTR	host-84-51-46-164.teletektelekom.com
84.51.46.234	PTR	host-84-51-46-234.teletektelekom.com
84.51.46.236	PTR	host-84-51-46-236.teletektelekom.com
84.51.46.250	PTR	host-84-51-46-250.teletektelekom.com
84.51.47.10	PTR	mail.dunyagoz.com
84.51.47.10	A	mail.compeople.web.tr
84.51.47.10	A	mail.embagroup.com.tr
84.51.47.36	PTR	hggumruk.com.tr
84.51.47.36	PTR	exc.hggumruk.com.tr
84.51.47.36	A	mail.hglojistik.com
84.51.47.37	PTR	host-84-51-47-37.teletektelekom.com
84.51.47.63	PTR	host-84-51-47-63.teletektelekom.com
84.51.47.66	PTR	heytrends.com
84.51.47.67	PTR	heytekstil.com
84.51.47.67	PTR	mail.heytekstil.com
84.51.47.123	PTR	host-84-51-47-123.teletektelekom.com
84.51.47.130	PTR	mail.apexfabrics.com
84.51.47.130	PTR	mail.besasunideri.com
84.51.47.130	PTR	mail.sahinlersd.com
84.51.47.138	A+PTR	mail.cicekshipyard.com
84.51.47.163	PTR	mail.goral.com.tr
84.51.47.210	PTR	host-84-51-47-210.teletektelekom.com
84.51.47.243	A+PTR	mail.fuelatvivakiturkey.com
84.51.47.243	A+PTR	mail.smgturkey.com.tr
84.51.47.243	A	mail.publicisfmcg-tr.com
84.51.47.244	A	b2b.davetotomotiv.com.tr
84.51.47.246	A	smginvoicetracking.com