Robtex

Up: 77.72.120.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 77.72.120.0/23
Down right: 77.72.122.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.72.120.6	A+PTR	ns1.chtp.net
77.72.120.18	A+PTR	srv-edge1.yka.spb.ru
77.72.120.22	PTR	22.120.72.77.chtp.net
77.72.120.22	A	mail.chtp.ru
77.72.120.22	A	mail2.chtp.net
77.72.120.70	PTR	rius.ru
77.72.120.78	A+PTR	mail.sstroys.ru
77.72.120.78	A	sstroys.ru
77.72.120.78	A	www.sstroys.ru
77.72.120.82	PTR	mx.trimita.ru
77.72.120.86	A	mail.speckon.ru
77.72.120.90	PTR	tgate.tridentsa.spb.ru
77.72.120.91	PTR	tgate.tridentsa.spb.ru
77.72.120.92	PTR	tgate.tridentsa.spb.ru
77.72.120.93	PTR	tgate.tridentsa.spb.ru
77.72.120.94	PTR	tgate.tridentsa.spb.ru
77.72.120.118	PTR	mail.genshipcompany.com
77.72.120.138	A	mail.supermaritime.ru
77.72.120.142	A	ns.tfl.spb.ru
77.72.120.150	A	picfs.com
77.72.120.178	PTR	178.120.72.77.chtp.net
77.72.120.220	A+PTR	mail.bta-spb.com
77.72.120.220	A	mail.bta-spb.ru
77.72.120.222	A+PTR	mail2.bta-spb.com
77.72.120.222	A	mail2.bta-spb.ru
77.72.121.6	A+PTR	ns2.chtp.net
77.72.121.11	PTR	porthouse.ru
77.72.121.11	A	xn--e1afawgidkn.xn--p1ai
77.72.121.12	A	mail1.chtp.net
77.72.121.98	A+PTR	yka.spb.ru
77.72.121.122	PTR	122.121.72.77.chtp.net
77.72.121.122	A	mail2.vender-climat.ru
77.72.121.130	PTR	130.121.72.77.chtp.net
77.72.121.170	A+PTR	m-relay.smart-company.ru
77.72.121.178	PTR	178.121.72.77.chtp.net
77.72.121.178	A	www.lto-plast.ru
77.72.121.178	A	moyka-spb.ru
77.72.121.182	A	lenoblles.ru
77.72.121.255	PTR	255.121.72.77.chtp.net
77.72.122.18	A	mail.gvardman.ru
77.72.122.26	PTR	26.122.72.77.chtp.net
77.72.122.74	PTR	74.122.72.77.chtp.net
77.72.122.234	PTR	base.icedoor.ru
77.72.122.234	A	mx.larnek.ru
77.72.122.234	A	mx.barondveri.ru
77.72.123.38	A+PTR	mail.spb.parus.ru
77.72.123.38	A	spb.parus.com
77.72.123.38	A	mail.spb.parus.com
77.72.123.54	A+PTR	relay.talvi.spb.ru
77.72.123.198	A+PTR	mail.dancepromo.ru
77.72.123.198	A	mail.dmgdmg.ru
77.72.123.198	A	dancepromo.ru
77.72.123.206	A	mail.petrospectiva.ru
77.72.123.230	A+PTR	mail.bsem.su
77.72.123.255	PTR	255.123.72.77.chtp.net