Robtex

Up: 5.206.64.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 5.206.64.0/20
Down right: 5.206.80.0/20

IP	Type	Hostname
5.206.64.0	PTR	pool-5-206-64-0.is74.ru
5.206.72.74	PTR	pool-5-206-72-74.is74.ru
5.206.72.113	PTR	pool-5-206-72-113.is74.ru
5.206.72.134	PTR	pool-5-206-72-134.is74.ru
5.206.73.243	PTR	pool-5-206-73-243.is74.ru
5.206.75.33	PTR	pool-5-206-75-33.is74.ru
5.206.79.33	PTR	pool-5-206-79-33.is74.ru
5.206.80.80	PTR	pool-5-206-80-80.is74.ru
5.206.80.214	PTR	pool-5-206-80-214.is74.ru
5.206.81.136	PTR	pool-5-206-81-136.is74.ru
5.206.83.2	PTR	pool-5-206-83-2.is74.ru
5.206.83.107	PTR	pool-5-206-83-107.is74.ru
5.206.84.35	PTR	pool-5-206-84-35.is74.ru
5.206.88.1	PTR	pool-5-206-88-1.is74.ru
5.206.91.227	PTR	pool-5-206-91-227.is74.ru