Robtex

Up: 91.228.30.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 91.228.30.0/25
Down right: 91.228.30.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
91.228.30.7	A+PTR	diskus-telecom.ru
91.228.30.7	A+PTR	dt54.ru
91.228.30.7	A+PTR	www.diskus-telecom.ru
91.228.30.8	A+PTR	ns1.dt54.ru
91.228.30.42	A	91-228-30-42.dt54.ru
91.228.30.99	PTR	91-228-30-99.dt54.ru
91.228.30.116	A+PTR	91-228-30-116.dt54.ru