Robtex

Up: 78.189.16.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 78.189.16.0/25
Down right: 78.189.16.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
78.189.16.0	PTR	78.189.16.0.dynamic.ttnet.com.tr
78.189.16.1	PTR	78.189.16.1.static.ttnet.com.tr
78.189.16.5	PTR	78.189.16.5.static.ttnet.com.tr
78.189.16.12	PTR	78.189.16.12.dynamic.ttnet.com.tr
78.189.16.14	PTR	78.189.16.14.static.ttnet.com.tr
78.189.16.15	PTR	78.189.16.15.static.ttnet.com.tr
78.189.16.16	PTR	78.189.16.16.dynamic.ttnet.com.tr
78.189.16.17	PTR	78.189.16.17.static.ttnet.com.tr
78.189.16.20	PTR	78.189.16.20.static.ttnet.com.tr
78.189.16.21	PTR	78.189.16.21.dynamic.ttnet.com.tr
78.189.16.22	PTR	78.189.16.22.static.ttnet.com.tr
78.189.16.23	PTR	78.189.16.23.static.ttnet.com.tr
78.189.16.26	PTR	78.189.16.26.static.ttnet.com.tr
78.189.16.26	A	mx.itm.com.tr
78.189.16.26	A	mail.itmbilgisayar.com
78.189.16.28	PTR	78.189.16.28.static.ttnet.com.tr
78.189.16.30	PTR	78.189.16.30.static.ttnet.com.tr
78.189.16.31	PTR	78.189.16.31.static.ttnet.com.tr
78.189.16.33	PTR	78.189.16.33.static.ttnet.com.tr
78.189.16.37	PTR	78.189.16.37.static.ttnet.com.tr
78.189.16.43	PTR	78.189.16.43.static.ttnet.com.tr
78.189.16.48	PTR	78.189.16.48.dynamic.ttnet.com.tr
78.189.16.49	PTR	78.189.16.49.static.ttnet.com.tr
78.189.16.53	PTR	78.189.16.53.static.ttnet.com.tr
78.189.16.59	PTR	78.189.16.59.static.ttnet.com.tr
78.189.16.61	PTR	78.189.16.61.static.ttnet.com.tr
78.189.16.64	PTR	78.189.16.64.static.ttnet.com.tr
78.189.16.67	PTR	78.189.16.67.static.ttnet.com.tr
78.189.16.69	PTR	78.189.16.69.static.ttnet.com.tr
78.189.16.73	PTR	78.189.16.73.static.ttnet.com.tr
78.189.16.74	PTR	78.189.16.74.static.ttnet.com.tr
78.189.16.76	PTR	78.189.16.76.static.ttnet.com.tr
78.189.16.81	PTR	78.189.16.81.static.ttnet.com.tr
78.189.16.82	PTR	78.189.16.82.static.ttnet.com.tr
78.189.16.84	PTR	78.189.16.84.static.ttnet.com.tr
78.189.16.86	PTR	78.189.16.86.static.ttnet.com.tr
78.189.16.86	A	mail.locamuhendislik.com
78.189.16.91	PTR	78.189.16.91.static.ttnet.com.tr
78.189.16.92	PTR	78.189.16.92.static.ttnet.com.tr
78.189.16.93	PTR	78.189.16.93.dynamic.ttnet.com.tr
78.189.16.97	PTR	78.189.16.97.static.ttnet.com.tr
78.189.16.99	PTR	78.189.16.99.static.ttnet.com.tr
78.189.16.105	PTR	78.189.16.105.static.ttnet.com.tr
78.189.16.109	PTR	78.189.16.109.static.ttnet.com.tr
78.189.16.111	PTR	78.189.16.111.static.ttnet.com.tr
78.189.16.114	PTR	78.189.16.114.dynamic.ttnet.com.tr
78.189.16.118	PTR	78.189.16.118.static.ttnet.com.tr
78.189.16.119	PTR	78.189.16.119.static.ttnet.com.tr
78.189.16.125	PTR	78.189.16.125.static.ttnet.com.tr
78.189.16.130	PTR	78.189.16.130.dynamic.ttnet.com.tr
78.189.16.133	PTR	78.189.16.133.static.ttnet.com.tr
78.189.16.134	PTR	78.189.16.134.static.ttnet.com.tr
78.189.16.137	PTR	78.189.16.137.static.ttnet.com.tr
78.189.16.140	PTR	78.189.16.140.static.ttnet.com.tr
78.189.16.141	PTR	78.189.16.141.static.ttnet.com.tr
78.189.16.142	PTR	78.189.16.142.static.ttnet.com.tr
78.189.16.143	PTR	78.189.16.143.static.ttnet.com.tr
78.189.16.143	A	mail.kemalbalikcilik.com
78.189.16.144	PTR	78.189.16.144.static.ttnet.com.tr
78.189.16.147	PTR	78.189.16.147.dynamic.ttnet.com.tr
78.189.16.151	PTR	78.189.16.151.static.ttnet.com.tr
78.189.16.153	PTR	78.189.16.153.static.ttnet.com.tr
78.189.16.154	PTR	78.189.16.154.static.ttnet.com.tr
78.189.16.157	PTR	78.189.16.157.dynamic.ttnet.com.tr
78.189.16.159	PTR	78.189.16.159.static.ttnet.com.tr
78.189.16.162	PTR	78.189.16.162.static.ttnet.com.tr
78.189.16.165	PTR	78.189.16.165.static.ttnet.com.tr
78.189.16.166	PTR	78.189.16.166.static.ttnet.com.tr
78.189.16.167	PTR	78.189.16.167.static.ttnet.com.tr
78.189.16.168	PTR	78.189.16.168.static.ttnet.com.tr
78.189.16.173	PTR	78.189.16.173.static.ttnet.com.tr
78.189.16.175	PTR	78.189.16.175.static.ttnet.com.tr
78.189.16.176	PTR	78.189.16.176.static.ttnet.com.tr
78.189.16.179	PTR	78.189.16.179.static.ttnet.com.tr
78.189.16.180	PTR	78.189.16.180.static.ttnet.com.tr
78.189.16.181	PTR	78.189.16.181.static.ttnet.com.tr
78.189.16.183	PTR	78.189.16.183.static.ttnet.com.tr
78.189.16.187	PTR	78.189.16.187.static.ttnet.com.tr
78.189.16.191	PTR	78.189.16.191.static.ttnet.com.tr
78.189.16.196	PTR	78.189.16.196.static.ttnet.com.tr
78.189.16.197	PTR	78.189.16.197.static.ttnet.com.tr
78.189.16.200	PTR	78.189.16.200.static.ttnet.com.tr
78.189.16.200	A	mail.corusyasan.com.tr
78.189.16.202	PTR	78.189.16.202.static.ttnet.com.tr
78.189.16.203	PTR	78.189.16.203.static.ttnet.com.tr
78.189.16.206	PTR	78.189.16.206.static.ttnet.com.tr
78.189.16.211	PTR	78.189.16.211.static.ttnet.com.tr
78.189.16.212	PTR	78.189.16.212.static.ttnet.com.tr
78.189.16.220	PTR	78.189.16.220.static.ttnet.com.tr
78.189.16.222	PTR	78.189.16.222.static.ttnet.com.tr
78.189.16.230	PTR	78.189.16.230.static.ttnet.com.tr
78.189.16.232	PTR	78.189.16.232.static.ttnet.com.tr
78.189.16.238	PTR	78.189.16.238.static.ttnet.com.tr
78.189.16.240	PTR	78.189.16.240.static.ttnet.com.tr
78.189.16.241	PTR	78.189.16.241.static.ttnet.com.tr
78.189.16.246	PTR	78.189.16.246.static.ttnet.com.tr
78.189.16.248	PTR	78.189.16.248.static.ttnet.com.tr
78.189.16.249	PTR	78.189.16.249.static.ttnet.com.tr