Robtex

Up: 91.221.42.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 91.221.42.0/25
Down right: 91.221.42.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.221.42.14	PTR	ved.ru
91.221.42.14	A	mailoffice.ved.ru
91.221.42.14	A	gw.ved.ru
91.221.42.42	PTR	micron.mosrp.net
91.221.42.42	A	mosturflot-service.ru
91.221.42.42	A	xn--g1abfyp4c.xn--p1ai
91.221.42.43	A+PTR	canopus.mosrp.net
91.221.42.43	A	ns3.af7.ru
91.221.42.43	A	3dns-2.fremd-ficken.net
91.221.42.45	A+PTR	mail.mosrp.ru
91.221.42.46	A+PTR	sirius.mosrp.net
91.221.42.46	A	ns1.mosrp.net
91.221.42.46	A	ns2.af7.ru
91.221.42.50	A	mosrechflot.ru
91.221.42.50	A	cruiseagent.ru
91.221.42.51	A	xn--e1aatgcmadr1bk.xn--p1ai
91.221.42.53	A+PTR	mail.mosturflot.com
91.221.42.53	A+PTR	mail.mosturflot.ru
91.221.42.91	A	mail.xn--e1agfnl7b5a.xn--p1ai
91.221.42.91	A	xn--e1agfnl7b5a.xn--p1ai
91.221.42.91	A	ns1.xn--e1agfnl7b5a.xn--p1ai
91.221.42.210	A+PTR	mail.srport.ru
91.221.42.210	A	mail.citytour-stolitsa.ru