Robtex

Up: 78.153.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 78.153.16.0/21
Down right: 78.153.24.0/21

IP	Type	Hostname
78.153.16.0	PTR	16-0.e66.utk.ru
78.153.17.72	PTR	17-72.e66.utk.ru
78.153.17.77	PTR	17-77.e66.utk.ru
78.153.17.178	PTR	17-178.e66.utk.ru
78.153.18.145	PTR	18-145.e66.utk.ru
78.153.19.0	PTR	19-0.e66.utk.ru
78.153.19.53	PTR	19-53.e66.utk.ru
78.153.19.93	A	xn--l1aqa6b.xn--p1ai
78.153.20.117	PTR	20-117.e66.utk.ru
78.153.20.221	PTR	20-221.e66.utk.ru
78.153.21.49	PTR	21-49.e66.utk.ru
78.153.21.92	PTR	21-92.e66.utk.ru
78.153.21.116	PTR	21-116.e66.utk.ru
78.153.21.173	PTR	21-173.e66.utk.ru
78.153.22.217	PTR	22-217.e66.utk.ru
78.153.22.222	PTR	22-222.e66.utk.ru
78.153.22.226	PTR	22-226.e66.utk.ru
78.153.23.189	PTR	23-189.e66.utk.ru
78.153.23.236	PTR	23-236.e66.utk.ru
78.153.24.64	PTR	24-64.e66.utk.ru
78.153.25.137	PTR	25-137.e66.utk.ru
78.153.25.209	PTR	25-209.e66.utk.ru
78.153.26.29	PTR	26-29.e66.utk.ru
78.153.26.164	PTR	26-164.e66.utk.ru
78.153.26.188	PTR	26-188.e66.utk.ru
78.153.26.222	PTR	26-222.e66.utk.ru
78.153.27.55	PTR	27-55.e66.utk.ru
78.153.27.188	PTR	27-188.e66.utk.ru
78.153.28.87	PTR	28-87.e66.utk.ru
78.153.28.170	A	belkar.wrar.name
78.153.29.1	PTR	29-1.e66.utk.ru
78.153.30.3	PTR	30-3.e66.utk.ru
78.153.31.79	PTR	31-79.e66.utk.ru