Robtex

Up: 87.238.96.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 87.238.96.0/23
Down right: 87.238.98.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
87.238.96.6	A+PTR	basicprovider.ru
87.238.96.6	A	bprovider.ru
87.238.96.246	PTR	ns2.bs4b.net
87.238.96.246	A	bs4b.ru
87.238.96.246	A	msk.bs4b.net
87.238.97.196	PTR	ns.bs4b.net
87.238.97.197	A	bsh.ru
87.238.98.129	A	vts-1.bs4b.net
87.238.98.131	A	m9-sw-1.msk.bs4b.net
87.238.98.134	A	asrz.bs4b.net
87.238.98.196	PTR	ns.bs4b.net
87.238.98.254	PTR	ns2.bs4b.net
87.238.99.138	PTR	mail-2.metronom-ag.ru
87.238.99.138	A	mail.metronom-ag.ru
87.238.99.138	A	mail-2.merkadomarket.ru
87.238.99.150	A+PTR	mail.543.ru
87.238.99.150	A	mail.happyhome.ru
87.238.99.150	A	mail.pp01.org
87.238.99.166	PTR	moo.efnet.org
87.238.99.196	PTR	ns.bs4b.net