Robtex

Up: 89.248.124.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 89.248.124.0/25
Down right: 89.248.124.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
89.248.124.0	A+PTR	0.124.248.89.in-addr.arpa
89.248.124.5	A+PTR	autodiscover.rostar.biz
89.248.124.5	A+PTR	mail2.rostar.biz
89.248.124.5	A	5.124.248.89.in-addr.arpa
89.248.124.51	A+PTR	51.124.248.89.in-addr.arpa