Robtex

Up: 84.51.48.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 84.51.48.0/25
Down right: 84.51.48.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
84.51.48.37	PTR	host-84-51-48-37.teletektelekom.com
84.51.48.37	A	posta.guvenok.com.tr
84.51.48.40	PTR	host-84-51-48-40.teletektelekom.com
84.51.48.40	A	mail.guvenok.com.tr
84.51.48.40	A	mail3.guvenok.com.tr
84.51.48.42	PTR	host-84-51-48-42.teletektelekom.com
84.51.48.42	A	mail.teknolojifirmalari.com
84.51.48.42	A	mail.regnum.com.tr
84.51.48.43	A+PTR	mail.doradonatural.com
84.51.48.43	PTR	mail.gordeszeolite.com
84.51.48.43	PTR	mail.ikbal.com
84.51.48.90	PTR	host-84-51-48-90.teletektelekom.com
84.51.48.130	PTR	host-84-51-48-130.teletektelekom.com
84.51.48.138	PTR	mail.ercangroup.com
84.51.48.138	PTR	mail.thecolourshotels.com
84.51.48.138	A+PTR	posta.ercangroup.com
84.51.48.146	PTR	host-84-51-48-146.teletektelekom.com
84.51.48.186	PTR	host-84-51-48-186.teletektelekom.com