Robtex

Up: 77.72.120.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 77.72.124.0/23
Down right: 77.72.126.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.72.124.22	A+PTR	server.mailagent.spb.ru
77.72.124.22	A	mailagent.spb.ru
77.72.124.22	A	mail.chtp.net
77.72.124.34	A	mail.dialogwms.ru
77.72.124.74	PTR	srv.lincomp.ru
77.72.124.86	PTR	86.124.72.77.chtp.net
77.72.124.112	PTR	112.124.72.77.chtp.net
77.72.124.138	PTR	arctech.ru
77.72.124.186	PTR	186.124.72.77.chtp.net
77.72.124.190	PTR	190.124.72.77.chtp.net
77.72.124.246	PTR	246.124.72.77.chtp.net
77.72.125.43	PTR	43.125.72.77.chtp.net
77.72.125.50	A+PTR	mail.darex.spb.ru
77.72.125.86	PTR	86.125.72.77.chtp.net
77.72.125.86	A	mail.brandmix.ru
77.72.125.86	A	mail.abd-spb.ru
77.72.125.98	A+PTR	mail.alee.ru
77.72.125.98	A	pechkin.alee.com
77.72.125.100	PTR	100.125.72.77.chtp.net
77.72.125.100	A	scandocs.ru
77.72.125.100	A	elibconsalt.ru
77.72.125.106	PTR	106.125.72.77.chtp.net
77.72.125.106	A	www.atiz.ru
77.72.125.106	A	elarchivo.ru
77.72.125.110	PTR	myasoprom.ru
77.72.125.138	PTR	mail.sro-mosk.ru
77.72.125.142	A	mail.rusar-trade.com
77.72.125.146	PTR	146.125.72.77.chtp.net
77.72.125.158	PTR	158.125.72.77.chtp.net
77.72.125.214	PTR	214.125.72.77.chtp.net
77.72.125.229	PTR	mzarsenal.chtp.net
77.72.125.229	A	mail.mobimeter.net
77.72.125.229	A	www.zaoklfz.ru
77.72.125.234	A	centr100.com
77.72.125.235	PTR	235.125.72.77.chtp.net
77.72.125.235	A	quadrivium.ru
77.72.125.241	PTR	241.125.72.77.chtp.net
77.72.125.241	A	quadrivium.ru
77.72.125.241	A	ilich-home.ru
77.72.125.242	PTR	242.125.72.77.chtp.net
77.72.125.244	PTR	244.125.72.77.chtp.net
77.72.125.244	A	www.zaoklfz.ru
77.72.125.244	A	decoeco.ru
77.72.125.252	PTR	252.125.72.77.chtp.net
77.72.125.252	A	basseinsvetlana.ru
77.72.125.252	A	lgrt.ru
77.72.126.62	A	www.finextech.com
77.72.126.74	PTR	74.126.72.77.chtp.net
77.72.126.74	A	mail.kvartet.spb.ru
77.72.126.106	PTR	106.126.72.77.chtp.net
77.72.126.106	A	mail.erlangnw.ru
77.72.126.138	A+PTR	mail2.i-t.spb.ru
77.72.126.222	PTR	mail.labpoint.ru
77.72.126.234	PTR	234.126.72.77.chtp.net
77.72.126.234	A	mail.bmg-nedra.ru
77.72.127.2	A+PTR	mail.osti.ru
77.72.127.2	A	osti.it-ic.ru
77.72.127.19	A+PTR	mail.eltrast.ru
77.72.127.19	A	ns1.eltrast.ru
77.72.127.19	A	eltrast.ru
77.72.127.32	PTR	32.127.72.77.chtp.net
77.72.127.44	PTR	44.127.72.77.chtp.net
77.72.127.44	A	geointellect.com
77.72.127.58	PTR	58.127.72.77.chtp.net
77.72.127.58	A	tp-mebelnaya.ru
77.72.127.58	A	tp-borovaya.ru
77.72.127.60	PTR	60.127.72.77.chtp.net
77.72.127.60	A	www.6550101.ru
77.72.127.60	A	6550101.ru
77.72.127.61	A	bonus-za-arendatora.ru
77.72.127.84	PTR	84.127.72.77.chtp.net
77.72.127.118	PTR	118.127.72.77.chtp.net
77.72.127.118	A	mail.epce.su
77.72.127.118	A	mail.pspenergy.com.ru
77.72.127.126	PTR	126.127.72.77.chtp.net
77.72.127.174	A+PTR	ns.weiss-electronic.spb.ru
77.72.127.174	A	spb1.autosat.com
77.72.127.174	A	spb1.glosav.ru
77.72.127.186	A	mail.1cborc.ru
77.72.127.230	PTR	230.127.72.77.chtp.net
77.72.127.230	A	mx.gtionline.ru
77.72.127.246	PTR	mail.meg-group.ru
77.72.127.246	A	mail.td-neva.ru
77.72.127.255	PTR	255.127.72.77.chtp.net