Robtex

Up: 84.51.14.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 84.51.15.0/25
Down right: 84.51.15.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
84.51.15.1	PTR	host-84-51-15-1.teletektelekom.com
84.51.15.10	PTR	host-84-51-15-10.teletektelekom.com
84.51.15.25	A+PTR	mail.sentimduyuru.com
84.51.15.25	A	sentimduyuru.com
84.51.15.34	PTR	medicalpark.com.tr
84.51.15.57	PTR	host-84-51-15-57.teletektelekom.com
84.51.15.57	A	smtp2.livclinics.com
84.51.15.57	A	smtp2.btnassistance.com
84.51.15.66	PTR	smtpgw.sentim.com.tr
84.51.15.67	PTR	host-84-51-15-67.teletektelekom.com
84.51.15.67	A	www.sentimyazilim.com.tr
84.51.15.67	A	www.sentim.com.tr
84.51.15.71	PTR	mail.krncity.com
84.51.15.71	PTR	simail.krncity.com
84.51.15.71	PTR	mail.d2.com.tr
84.51.15.72	PTR	smtpgw.krncity.com
84.51.15.72	PTR	smtpgw.d2.com.tr
84.51.15.72	PTR	smtpgw.dekare.com.tr
84.51.15.74	PTR	sentim.com.tr
84.51.15.90	PTR	samail.sentim.com.tr
84.51.15.90	A	ibex02.istanbulbilisim.com.tr
84.51.15.101	A	ns1.aljazeera-turk.net
84.51.15.107	A	mail.aljazeera-turk.net
84.51.15.109	A	ns2.aljazeera-turk.net
84.51.15.114	A+PTR	medsrv7.medicalpark.com.tr
84.51.15.114	PTR	smtp.medicalpark.com.tr
84.51.15.115	A	ns1.medicalpark.com.tr
84.51.15.116	PTR	host-84-51-15-116.teletektelekom.com
84.51.15.116	A	epilepsimerkezi.com
84.51.15.116	A	aciltravma.com
84.51.15.166	PTR	host-84-51-15-166.teletektelekom.com
84.51.15.166	A	fortilog.com
84.51.15.166	A	fortilog.net
84.51.15.178	PTR	host-84-51-15-178.teletektelekom.com
84.51.15.178	A	mail.yavuzselimsen.com.tr
84.51.15.181	PTR	host-84-51-15-181.teletektelekom.com
84.51.15.181	A	smtpgw.yavuzselimsen.com.tr