Robtex

Up: 91.221.28.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 91.221.28.0/24
Down right: 91.221.29.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.221.28.0	PTR	ip-91-221-28-0.sf-501.wise-net.ru
91.221.28.3	A+PTR	ns1.wise-net.ru
91.221.28.3	A	nat.wise-net.ru
91.221.28.69	PTR	ip-91-221-28-69.f-f-u.wise-net.ru
91.221.28.165	PTR	ip-91-221-28-165.f-f-u.wise-net.ru
91.221.29.3	A+PTR	ns2.wise-net.ru
91.221.29.3	A	wise-home.ru
91.221.29.3	A	swelt.ru
91.221.29.5	PTR	ip-91-221-29-5.sf-502.wise-net.ru
91.221.29.5	A	hbmc.ru
91.221.29.5	A	flyq.ru
91.221.29.7	A+PTR	mx2.fsa.ru
91.221.29.8	A+PTR	mx.fsa.ru
91.221.29.8	A	www.fsa.ru
91.221.29.8	A	fsa.ru
91.221.29.10	PTR	mail.wise-net.ru
91.221.29.12	PTR	ip-91-221-29-12.sf-502.wise-net.ru
91.221.29.12	A	stroymaterial365.ru
91.221.29.12	A	xn--24-vlcajbtn.xn--p1ai
91.221.29.13	PTR	blackhole.fsa.ru
91.221.29.28	PTR	ip-91-221-29-28.f-f-u.wise-net.ru
91.221.29.49	PTR	ip-91-221-29-49.f-f-u.wise-net.ru
91.221.29.49	A	djuffin.ru
91.221.29.52	PTR	ip-91-221-29-52.f-f-u.wise-net.ru
91.221.29.52	A	myrti.ru
91.221.29.102	PTR	ip-91-221-29-102.nat-pool.wise-net.ru
91.221.29.134	A+PTR	it.textiles.ru
91.221.29.135	PTR	webmail.textiles.ru
91.221.29.155	PTR	ip-91-221-29-155.static.wise-net.ru
91.221.29.181	PTR	ip-91-221-29-181.static.wise-net.ru
91.221.29.187	PTR	ip-91-221-29-187.static.wise-net.ru
91.221.29.187	A	mail.sw-hotel.ru
91.221.29.255	PTR	ip-91-221-29-255.static.wise-net.ru