Robtex

Up: 77.72.16.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 77.72.16.0/24
Down right: 77.72.17.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.72.16.2	PTR	office-m9.zaovtk.ru
77.72.16.73	PTR	mail5.zaovtk.ru
77.72.16.194	PTR	mx.tdsp.ru
77.72.16.194	PTR	ns1.tdsp.ru
77.72.17.17	PTR	ns2.ping2b.ru
77.72.17.17	A	ns2.ping4u.ru
77.72.17.21	PTR	m9-mera1.zaovtk.ru
77.72.17.23	PTR	m9-mera2.ping2b.ru
77.72.17.24	PTR	m9-bill.zaovtk.ru
77.72.17.26	PTR	ambs1.ping2b.ru
77.72.17.33	PTR	m9-mera3.zaovtk.ru
77.72.17.34	PTR	mail.ping2b.ru
77.72.17.34	A	ns1.ping2b.ru
77.72.17.34	A	ns.ping2b.ru
77.72.17.36	PTR	m9-bill2.zaovtk.ru