Robtex

Up: 81.30.220.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 81.30.222.0/24
Down right: 81.30.223.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.30.222.0	A+PTR	81.30.222.0.static.ufanet.ru
81.30.222.42	A	bal-service.ru
81.30.222.74	A+PTR	ufa.rusimport.ru
81.30.222.74	A	mx.ufa.rusimport.ru
81.30.222.106	A	mail.ozneftehim.ru
81.30.222.110	A+PTR	mail.geospace-ufa.ru
81.30.222.114	PTR	81.30.222.114.static.ufanet.ru
81.30.222.114	A	amigas.ru
81.30.222.202	A+PTR	81.30.222.202.static.ufanet.ru
81.30.223.15	PTR	81.30.223.15.dynamic.ufanet.ru
81.30.223.15	A	teploufa.ru
81.30.223.19	PTR	81.30.223.19.dynamic.ufanet.ru
81.30.223.19	A	shariki-ufa.ru
81.30.223.23	PTR	81.30.223.23.dynamic.ufanet.ru
81.30.223.23	A	2991117.ru
81.30.223.23	A	xn----7sbbrsskgfmcegigj6o.xn--p1ai
81.30.223.41	A	xn----7sbabhdv8a7ajv.xn--p1ai
81.30.223.41	A	aqua-averon.ru
81.30.223.41	A	mail.xn----7sbabhdv8a7ajv.xn--p1ai
81.30.223.71	PTR	81.30.223.71.static.ufanet.ru
81.30.223.97	PTR	81.30.223.97.static.ufanet.ru
81.30.223.97	A	81.30.223.97.dynamic.ufanet.ru
81.30.223.100	PTR	81.30.223.100.dynamic.ufanet.ru
81.30.223.101	PTR	81.30.223.101.dynamic.ufanet.ru
81.30.223.101	A	mail.vlamas.ru
81.30.223.101	A	vlamas.ru
81.30.223.107	PTR	81.30.223.107.dynamic.ufanet.ru
81.30.223.158	PTR	81.30.223.158.dynamic.ufanet.ru
81.30.223.158	A	dc-7245f23ebfd8.justsendit.xyz
81.30.223.164	A+PTR	81.30.223.164.dynamic.ufanet.ru
81.30.223.166	A+PTR	81.30.223.166.dynamic.ufanet.ru
81.30.223.166	A	0422.ru
81.30.223.195	PTR	81.30.223.195.dynamic.ufanet.ru
81.30.223.202	A	drowez.ru
81.30.223.206	PTR	81.30.223.206.dynamic.ufanet.ru
81.30.223.231	PTR	81.30.223.231.dynamic.ufanet.ru
81.30.223.231	A	clubavtovaz.ru
81.30.223.231	A	lisq.ru
81.30.223.255	PTR	81.30.223.255.dynamic.ufanet.ru