Robtex

Up: 77.51.192.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 77.51.200.0/22
Down right: 77.51.204.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.51.200.0	PTR	pppoe-static.mosoblast.rt.ru
77.51.200.13	PTR	pppoe-static.mosoblast.rt.ru
77.51.200.13	A	mx-c.gardnerporcelain.com
77.51.200.14	PTR	pppoe-static.mosoblast.rt.ru
77.51.200.67	PTR	pppoe-static.mosoblast.rt.ru
77.51.200.70	PTR	mail1.aps-solver.com
77.51.200.70	A	mail4.aps-solver.com
77.51.200.70	A	mail1.1avtokombinat.com
77.51.200.162	PTR	pppoe-static.mosoblast.rt.ru
77.51.200.196	A	mail2.freezland.ru
77.51.201.12	PTR	pppoe-static.mosoblast.rt.ru
77.51.201.159	A	in.i-strela.ru
77.51.201.221	A	tollcard.ru
77.51.201.221	A	trucktoll.net
77.51.201.221	A	etoll.ru
77.51.202.15	A	ovoistra.ru
77.51.202.40	A	airtelecom.su
77.51.202.50	PTR	pppoe-static.mosoblast.rt.ru
77.51.202.56	PTR	pppoe-static.mosoblast.rt.ru
77.51.202.113	A	s-popkov.ru
77.51.202.140	A	ugodnoe.info
77.51.202.245	A	satellook.ru
77.51.202.246	PTR	pppoe-static.mosoblast.rt.ru
77.51.202.246	A	rmicro.ru
77.51.204.73	PTR	pppoe-static.mosoblast.rt.ru
77.51.204.73	A	immensus.ru
77.51.204.111	PTR	pppoe-static.mosoblast.rt.ru
77.51.204.111	A	icmse.su
77.51.205.49	PTR	pppoe-static.mosoblast.rt.ru
77.51.205.62	A	dpk-shodnya.ru
77.51.205.120	PTR	pppoe-static.mosoblast.rt.ru
77.51.205.120	A	sherkc.ru
77.51.205.191	PTR	pppoe-static.mosoblast.rt.ru
77.51.205.231	PTR	pppoe-static.mosoblast.rt.ru
77.51.207.29	A	nosto.ru
77.51.207.44	PTR	pppoe-static.mosoblast.rt.ru
77.51.207.44	A	1c4u.com
77.51.207.152	PTR	pppoe-static.mosoblast.rt.ru
77.51.207.152	A	anhsunamun-pc.com
77.51.207.255	PTR	pppoe-static.mosoblast.rt.ru