Robtex

Up: 84.51.12.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 84.51.12.0/25
Down right: 84.51.12.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
84.51.12.2	PTR	host-84-51-12-2.teletektelekom.com
84.51.12.32	A	ns1.andirinliyiz.biz
84.51.12.70	PTR	host-84-51-12-70.teletektelekom.com
84.51.12.70	A	ozkangumus.com
84.51.12.70	A	mail.ozkangumus.com
84.51.12.99	PTR	mail.atomiktekstil.com
84.51.12.99	PTR	mail.atomiktextile.com
84.51.12.99	PTR	mail.relakstekstil.com
84.51.12.150	PTR	host-84-51-12-150.teletektelekom.com
84.51.12.150	A	mx2.makinetix.com
84.51.12.150	A	mx1.makinetix.com
84.51.12.200	PTR	host-84-51-12-200.teletektelekom.com
84.51.12.200	A	john.denker.com.tr
84.51.12.252	PTR	host-84-51-12-252.teletektelekom.com