Robtex

Up: 145.216.0.0/14
Can't show all results, try to descend to a more specific CIDR
Down left: 145.216.0.0/16
Down right: 145.217.0.0/16

IP	Type	Hostname
145.216.0.0	PTR	145.216.early-registration.of.surfnet.invalid
145.216.3.2	PTR	145.216.early-registration.of.surfnet.invalid
145.216.5.2	PTR	145.216.early-registration.of.surfnet.invalid
145.216.7.2	PTR	145.216.early-registration.of.surfnet.invalid
145.216.13.2	PTR	145.216.early-registration.of.surfnet.invalid
145.216.18.2	PTR	145.216.early-registration.of.surfnet.invalid
145.216.18.3	PTR	145.216.early-registration.of.surfnet.invalid
145.216.90.174	PTR	145.216.early-registration.of.surfnet.invalid
145.216.100.1	PTR	145.216.early-registration.of.surfnet.invalid
145.216.100.3	PTR	145.216.early-registration.of.surfnet.invalid
145.216.199.122	PTR	145.216.early-registration.of.surfnet.invalid
145.216.199.122	A	okertfdsawesaw.ooo
145.217.0.75	PTR	145.217.early-registration.of.surfnet.invalid
145.217.1.2	PTR	145.217.early-registration.of.surfnet.invalid
145.217.5.2	PTR	145.217.early-registration.of.surfnet.invalid
145.217.14.2	PTR	145.217.early-registration.of.surfnet.invalid
145.217.151.213	PTR	145.217.early-registration.of.surfnet.invalid