Robtex

Up: 91.233.96.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 91.233.96.0/23
Down right: 91.233.98.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.233.96.0	PTR	dynamic-customer.i-net.dp.ua
91.233.96.1	PTR	dynamic-customer.inet.dp.ua
91.233.96.58	PTR	dynamic-customer.inet.dp.ua
91.233.97.8	PTR	dynamic-customer.inet.dp.ua
91.233.97.22	PTR	dynamic-customer.inet.dp.ua
91.233.97.23	PTR	dynamic-customer.inet.dp.ua
91.233.97.52	PTR	dynamic-customer.inet.dp.ua
91.233.97.57	PTR	dynamic-customer.inet.dp.ua
91.233.97.63	PTR	dynamic-customer.inet.dp.ua
91.233.97.73	PTR	dynamic-customer.inet.dp.ua
91.233.97.79	PTR	dynamic-customer.inet.dp.ua
91.233.97.91	PTR	dynamic-customer.inet.dp.ua
91.233.97.95	PTR	dynamic-customer.inet.dp.ua
91.233.97.106	PTR	dynamic-customer.inet.dp.ua
91.233.97.108	PTR	dynamic-customer.inet.dp.ua
91.233.97.117	PTR	dynamic-customer.inet.dp.ua
91.233.97.123	PTR	dynamic-customer.inet.dp.ua
91.233.97.139	PTR	dynamic-customer.inet.dp.ua
91.233.97.165	PTR	dynamic-customer.inet.dp.ua
91.233.97.179	PTR	dynamic-customer.inet.dp.ua
91.233.97.190	PTR	dynamic-customer.inet.dp.ua
91.233.97.193	PTR	dynamic-customer.inet.dp.ua
91.233.97.194	PTR	dynamic-customer.inet.dp.ua
91.233.97.213	PTR	dynamic-customer.inet.dp.ua
91.233.97.220	PTR	dynamic-customer.inet.dp.ua
91.233.97.224	PTR	dynamic-customer.inet.dp.ua
91.233.97.226	PTR	dynamic-customer.inet.dp.ua
91.233.97.227	PTR	dynamic-customer.inet.dp.ua
91.233.97.240	PTR	dynamic-customer.inet.dp.ua
91.233.97.243	PTR	dynamic-customer.inet.dp.ua
91.233.97.246	PTR	dynamic-customer.inet.dp.ua
91.233.97.249	PTR	dynamic-customer.inet.dp.ua
91.233.98.8	PTR	dynamic-customer.inet.dp.ua
91.233.98.12	PTR	dynamic-customer.inet.dp.ua
91.233.98.20	PTR	dynamic-customer.inet.dp.ua
91.233.98.27	PTR	dynamic-customer.inet.dp.ua
91.233.98.28	PTR	dynamic-customer.inet.dp.ua
91.233.98.37	PTR	dynamic-customer.inet.dp.ua
91.233.98.44	PTR	dynamic-customer.inet.dp.ua
91.233.98.49	PTR	dynamic-customer.inet.dp.ua
91.233.98.56	PTR	dynamic-customer.inet.dp.ua
91.233.98.58	PTR	dynamic-customer.inet.dp.ua
91.233.98.72	PTR	dynamic-customer.inet.dp.ua
91.233.98.76	PTR	dynamic-customer.inet.dp.ua
91.233.98.90	PTR	dynamic-customer.inet.dp.ua
91.233.98.106	PTR	dynamic-customer.inet.dp.ua
91.233.98.114	PTR	dynamic-customer.inet.dp.ua
91.233.98.130	PTR	dynamic-customer.inet.dp.ua
91.233.98.144	PTR	dynamic-customer.inet.dp.ua
91.233.98.147	PTR	dynamic-customer.inet.dp.ua
91.233.98.149	PTR	dynamic-customer.inet.dp.ua
91.233.98.151	PTR	dynamic-customer.inet.dp.ua
91.233.98.155	PTR	dynamic-customer.inet.dp.ua
91.233.98.164	PTR	dynamic-customer.inet.dp.ua
91.233.98.166	PTR	dynamic-customer.inet.dp.ua
91.233.98.169	PTR	dynamic-customer.inet.dp.ua
91.233.98.170	PTR	dynamic-customer.inet.dp.ua
91.233.98.175	PTR	dynamic-customer.inet.dp.ua
91.233.98.210	PTR	dynamic-customer.inet.dp.ua
91.233.98.215	PTR	dynamic-customer.inet.dp.ua
91.233.98.220	PTR	dynamic-customer.inet.dp.ua
91.233.98.228	PTR	dynamic-customer.inet.dp.ua
91.233.98.231	PTR	dynamic-customer.inet.dp.ua
91.233.98.242	PTR	dynamic-customer.inet.dp.ua
91.233.99.238	PTR	dynamic-customer.inet.dp.ua
91.233.99.241	PTR	dynamic-customer.inet.dp.ua
91.233.99.241	A	mail.inet.dp.ua
91.233.99.241	A	inet.dp.ua