Robtex

Up: 80.79.248.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 80.79.248.0/23
Down right: 80.79.250.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
80.79.248.27	PTR	stroyneva-3.cust.smartspb.net
80.79.248.27	A	mail.orionty.ru
80.79.248.27	A	orionty.ru
80.79.248.66	PTR	izmeron-0.cust.smartspb.net
80.79.248.66	A	mail.mrtsouz.ru
80.79.248.66	A	mail.vokzaly.ru
80.79.248.82	A	newtng.spb.ru
80.79.248.82	A	srvmail.newtng.spb.ru
80.79.248.106	PTR	softland1-2.cust.smartspb.net
80.79.248.106	A	ns0.vednews.ru
80.79.248.130	PTR	oooprospekt-1.cust.smartspb.net
80.79.248.130	A	mail.prospectgroup.ru
80.79.248.130	A	mail.4484499.ru
80.79.248.131	PTR	oooprospekt-2.cust.smartspb.net
80.79.248.178	A+PTR	antispam.ntpo-vektor.ru
80.79.248.178	A	mailsrv.ntpo-vektor.ru
80.79.248.195	A	mail.loksys.ru
80.79.248.202	A+PTR	mx2.gpte.ru
80.79.248.202	A	mx2.mrte.ru
80.79.248.234	A+PTR	owa.sksr.ru
80.79.248.234	A	owa.autopole.ru
80.79.248.234	A	mail.opelspb.ru
80.79.249.20	A	vpn.redmond-rus.com
80.79.249.37	PTR	mx01.redmond-rus.com
80.79.249.37	A	mail.redmond-ua.com
80.79.249.37	A	mail.alpha-rus.com
80.79.249.38	PTR	mx02.redmond-rus.com
80.79.249.46	A	mail2.multicooker.pl
80.79.249.46	A	mail2.redmond-kz.com
80.79.249.46	A	mail.redmond-kz.com
80.79.249.48	A	intraservice.tps.com.ru
80.79.249.49	A	redmonddrive.com
80.79.249.57	PTR	mail.redmond-rus.com
80.79.249.57	A	mail.redmond-ua.com
80.79.249.57	A	mail.alpha-rus.com
80.79.250.9	A+PTR	mx1.brokerkf.ru
80.79.250.60	PTR	ns1.brokerkf.ru
80.79.250.60	A	ns2.brokerkf.ru
80.79.251.10	A+PTR	rainbow.cust.smartspb.net
80.79.251.42	A	mx.indutech.ru
80.79.251.138	A+PTR	goldenvalley.cust.smartspb.net
80.79.251.238	A	mail.puratrans.ru
80.79.251.254	A	otg300.ru