Robtex

Up: 188.227.32.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 188.227.36.0/23
Down right: 188.227.38.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
188.227.36.0	PTR	188.227.36.0.ptspb.ru
188.227.36.36	A+PTR	mail.mzarsenal.spb.ru
188.227.36.36	A	www.mza.spb.ru
188.227.36.36	A	mza.spb.ru
188.227.36.37	PTR	ns.mza.spb.ru
188.227.36.99	PTR	mail.kbarsenal.ru
188.227.38.106	PTR	188.227.38.106.ptspb.ru
188.227.38.215	PTR	188.227.38.215.ptspb.ru