Robtex

Up: 81.90.220.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 81.90.220.0/24
Down right: 81.90.221.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.90.220.35	A+PTR	ns1.group-ru.ru
81.90.220.36	A+PTR	ns2.group-ru.ru
81.90.220.36	A	ns1.sotbi.su
81.90.220.42	PTR	aktia.ru
81.90.220.42	A	ark-d.ru
81.90.220.42	A	mail.aktia.ru
81.90.220.43	PTR	arkaim.biz
81.90.220.44	PTR	arkaim.su
81.90.220.44	A	xn--e1abfybgdpz1e.xn--p1ai
81.90.220.44	A	mail.plaza-ds.su
81.90.220.58	A	chl.mtsbank.ru
81.90.220.196	A	dom3g.com
81.90.221.113	A	www.74mgko2.ru
81.90.221.113	A	www.eko-dom74.su
81.90.221.113	A	kdez74.ru
81.90.221.192	A	ardurobot.ru