Robtex

Up: 89.255.64.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 89.255.65.0/25
Down right: 89.255.65.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
89.255.65.27	A+PTR	mail.uk-tm.ru
89.255.65.28	PTR	obl65-28.65.255.89.in-addr.arpa
89.255.65.28	A	v-r-k.ru
89.255.65.30	PTR	obl65-30.65.255.89.in-addr.arpa
89.255.65.34	A	mail.nbtec.ru
89.255.65.34	A	mx1.mail10.net
89.255.65.34	A	owa.mail10.net
89.255.65.66	PTR	obl65-66.65.255.89.in-addr.arpa
89.255.65.66	A	energopsb.ru
89.255.65.68	PTR	obl65-68.65.255.89.in-addr.arpa
89.255.65.68	A	ftp.zd-energo.ru
89.255.65.68	A	zaya.zd-energo.ru
89.255.65.75	PTR	mail.energopsb.ru
89.255.65.75	A	mx1.energopsb.ru
89.255.65.76	PTR	obl65-76.65.255.89.in-addr.arpa
89.255.65.76	A	mail.zd-energo.ru
89.255.65.83	PTR	obl65-83.65.255.89.in-addr.arpa
89.255.65.85	A	estate-tbilisi.com
89.255.65.90	PTR	mx0.pereprava.net
89.255.65.91	PTR	mx0.qblk.com
89.255.65.113	PTR	obl65-113.65.255.89.in-addr.arpa
89.255.65.131	A	ftp.nbtec.ru
89.255.65.132	PTR	ftp.nbtec.ru
89.255.65.132	A	ns2.strr.ru
89.255.65.132	A	ns1.mail10.net
89.255.65.136	A	web.mail10.net
89.255.65.180	PTR	obl65-180.65.255.89.in-addr.arpa
89.255.65.180	A	www.rosgranit.ru
89.255.65.180	A	mx.rosgranit.ru
89.255.65.183	PTR	obl65-183.65.255.89.in-addr.arpa
89.255.65.183	A	strr.ru
89.255.65.186	PTR	obl65-186.65.255.89.in-addr.arpa
89.255.65.186	A	mx2.mskstone.com
89.255.65.187	PTR	obl65-187.65.255.89.in-addr.arpa
89.255.65.187	A	strr.ru
89.255.65.187	A	www2.mskstone.com
89.255.65.188	A+PTR	mx.mskstone.com
89.255.65.188	A	mx.rosgranit.ru
89.255.65.188	A	mail.mskstone.com
89.255.65.190	A	newmail.freemsk.ru
89.255.65.210	A+PTR	ns2.nobel.su
89.255.65.255	PTR	obl65-255.65.255.89.in-addr.arpa