Robtex

Up: 31.41.192.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 31.41.192.0/22
Down right: 31.41.196.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
31.41.192.0	PTR	host-31-41-192-0.nsplus.ru
31.41.192.43	PTR	host-31-41-192-43.nsplus.ru
31.41.192.56	PTR	host-31-41-192-56.nsplus.ru
31.41.192.57	PTR	host-31-41-192-57.nsplus.ru
31.41.192.73	PTR	host-31-41-192-73.nsplus.ru
31.41.192.74	PTR	host-31-41-192-74.nsplus.ru
31.41.192.74	A	staroedobroe.ru
31.41.192.74	A	www.rga.ru
31.41.192.89	PTR	host-31-41-192-89.nsplus.ru
31.41.192.96	PTR	host-31-41-192-96.nsplus.ru
31.41.192.187	PTR	host-31-41-192-187.nsplus.ru
31.41.192.210	PTR	host-31-41-192-210.nsplus.ru
31.41.192.227	PTR	host-31-41-192-227.nsplus.ru
31.41.193.48	PTR	host-31-41-193-48.nsplus.ru
31.41.193.58	PTR	host-31-41-193-58.nsplus.ru
31.41.193.123	PTR	host-31-41-193-123.nsplus.ru
31.41.193.129	PTR	host-31-41-193-129.nsplus.ru
31.41.193.137	PTR	host-31-41-193-137.nsplus.ru
31.41.193.241	PTR	host-31-41-193-241.nsplus.ru
31.41.194.35	PTR	host-31-41-194-35.nsplus.ru
31.41.194.90	PTR	host-31-41-194-90.nsplus.ru
31.41.196.4	PTR	host-31-41-196-4.nsplus.ru
31.41.196.17	PTR	host-31-41-196-17.nsplus.ru
31.41.196.137	PTR	host-31-41-196-137.nsplus.ru
31.41.196.142	PTR	host-31-41-196-142.nsplus.ru
31.41.196.163	PTR	host-31-41-196-163.nsplus.ru
31.41.197.57	PTR	host-31-41-197-57.nsplus.ru
31.41.197.83	PTR	host-31-41-197-83.nsplus.ru
31.41.197.83	A	drugnet.am
31.41.197.83	A	www.drugnet.am
31.41.197.96	PTR	host-31-41-197-96.nsplus.ru
31.41.198.64	PTR	host-31-41-198-64.nsplus.ru
31.41.198.179	PTR	host-31-41-198-179.nsplus.ru
31.41.199.88	PTR	host-31-41-199-88.nsplus.ru
31.41.199.98	PTR	host-31-41-199-98.nsplus.ru
31.41.199.120	PTR	host-31-41-199-120.nsplus.ru