Robtex

Up: 81.30.192.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 81.30.193.0/25
Down right: 81.30.193.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.30.193.1	A+PTR	81.30.193.1.static.ufanet.ru
81.30.193.14	A+PTR	mx.garant-rb.ru
81.30.193.18	PTR	uns.ufanet.ru
81.30.193.78	A	lemm.ufanet.ru
81.30.193.122	A+PTR	81.30.193.122.static.ufanet.ru
81.30.193.124	A+PTR	81.30.193.124.static.ufanet.ru
81.30.193.125	A+PTR	81.30.193.125.static.ufanet.ru
81.30.193.136	A+PTR	smu-k.ufanet.ru
81.30.193.172	PTR	81.30.193.172.static.ufanet.ru
81.30.193.172	A	mail1.burintekh-aktive.com
81.30.193.172	A	mail1.burinteh.com
81.30.193.178	A+PTR	centurion.ufanet.ru
81.30.193.194	PTR	bgnh.ufanet.ru
81.30.193.218	PTR	81.30.193.218.static.ufanet.ru