Robtex

Up: 145.137.128.0/17
Can't show all results, try to descend to a more specific CIDR
Down left: 145.137.128.0/19
Down right: 145.137.160.0/19

IP	Type	Hostname
145.137.157.2	PTR	145.137.early-registration.of.surfnet.invalid
145.137.157.66	PTR	145.137.early-registration.of.surfnet.invalid
145.137.157.130	PTR	145.137.early-registration.of.surfnet.invalid
145.137.157.131	PTR	145.137.early-registration.of.surfnet.invalid
145.137.157.193	PTR	145.137.early-registration.of.surfnet.invalid
145.137.157.195	PTR	145.137.early-registration.of.surfnet.invalid