Robtex

Up: 91.196.4.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 91.196.5.0/25
Down right: 91.196.5.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.196.5.1	A+PTR	serv-gw.tkdialog.net
91.196.5.1	A	sip64.ru
91.196.5.2	A+PTR	ns2.tkdialog.net
91.196.5.2	A	ns2.delta64.ru
91.196.5.2	A	ns2.ts-region.ru
91.196.5.3	PTR	ns3.tkdialog.net
91.196.5.3	A	ns3.dialog64.ru
91.196.5.3	A	ns3.dialphone.ru
91.196.5.6	PTR	mail.tkdialog.net
91.196.5.10	A	post.tkdialog.net
91.196.5.17	A+PTR	g1.sip64.ru
91.196.5.27	A+PTR	g2.sip64.ru
91.196.5.40	A+PTR	mail.dialog64.ru
91.196.5.40	A	mail.tkdialog.net
91.196.5.40	A	mail.dialfon.ru