Robtex

Up: 89.34.230.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 89.34.230.0/25
Down right: 89.34.230.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
89.34.230.6	A	mail.alkiva.com
89.34.230.97	PTR	router-225-ip-89-34-230-97.tennet.ro
89.34.230.138	PTR	router-225-ip-89-34-230-138.tennet.ro
89.34.230.138	A	mail.kionom.com
89.34.230.138	A	mail.andeekor.ro