Robtex

Up: 88.86.90.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 88.86.91.0/25
Down right: 88.86.91.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
88.86.91.0	PTR	subnet0x4.91.quantum.ru
88.86.91.66	PTR	kr-rtrs.91.quantum.ru
88.86.91.66	A	ns.edelweiskursk.ru
88.86.91.66	A	tdkurskiy.ru
88.86.91.108	PTR	subnet108x4.91.quantum.ru
88.86.91.170	PTR	mail2.kursk.gkm.ru
88.86.91.218	PTR	kr-vipmedia.91.quantum.ru
88.86.91.250	A+PTR	mail.kpravda.ru
88.86.91.250	A	ns1.kpravda.ru
88.86.91.254	PTR	relay.kursk.quantum.ru
88.86.91.254	A	151.213.kursk.ptl.ru
88.86.91.254	A	147.61.175.79.kursk.ptl.ru
88.86.91.255	PTR	bcast252x4.91.quantum.ru