Robtex

Up: 84.51.28.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 84.51.29.0/25
Down right: 84.51.29.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
84.51.29.22	PTR	mail.ulker.com.tr
84.51.29.22	A	mail.paristanbul.com.tr
84.51.29.22	A	mail.citinicikar.com
84.51.29.135	PTR	host-84-51-29-135.teletektelekom.com
84.51.29.145	A	logbilgisayar.com
84.51.29.231	PTR	host-84-51-29-231.teletektelekom.com