Robtex

Up: 206.168.0.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 206.168.16.0/21
Down right: 206.168.24.0/21

IP	Type	Hostname
206.168.24.99	PTR	unused-space.coop.net
206.168.25.1	PTR	reverse-not-set.coop.net
206.168.25.19	PTR	reverse-not-set.coop.net
206.168.25.50	PTR	reverse-not-set.coop.net
206.168.25.81	PTR	reverse-not-set.coop.net
206.168.25.82	PTR	reverse-not-set.coop.net
206.168.25.97	PTR	reverse-not-set.coop.net
206.168.25.98	PTR	reverse-not-set.coop.net
206.168.25.113	PTR	reverse-not-set.coop.net
206.168.25.129	PTR	reverse-not-set.coop.net
206.168.25.144	PTR	reverse-not-set.coop.net
206.168.25.162	PTR	reverse-not-set.coop.net
206.168.25.177	PTR	reverse-not-set.coop.net
206.168.25.178	PTR	reverse-not-set.coop.net
206.168.25.179	PTR	reverse-not-set.coop.net
206.168.25.192	PTR	reverse-not-set.coop.net
206.168.25.193	PTR	reverse-not-set.coop.net
206.168.25.208	PTR	reverse-not-set.coop.net
206.168.25.211	PTR	reverse-not-set.coop.net
206.168.25.240	PTR	reverse-not-set.coop.net
206.168.25.242	PTR	reverse-not-set.coop.net
206.168.27.0	PTR	unused-space.coop.net
206.168.27.1	PTR	unused-space.coop.net
206.168.27.16	PTR	unused-space.coop.net
206.168.27.18	PTR	unused-space.coop.net
206.168.27.32	PTR	unused-space.coop.net
206.168.27.33	PTR	unused-space.coop.net
206.168.27.49	PTR	unused-space.coop.net
206.168.27.82	PTR	unused-space.coop.net
206.168.27.97	PTR	unused-space.coop.net
206.168.27.130	PTR	unused-space.coop.net
206.168.27.131	PTR	unused-space.coop.net
206.168.27.147	PTR	unused-space.coop.net
206.168.27.177	PTR	unused-space.coop.net
206.168.27.178	PTR	unused-space.coop.net
206.168.27.211	PTR	unused-space.coop.net
206.168.28.1	PTR	reverse-not-set.coop.net
206.168.28.17	PTR	reverse-not-set.coop.net
206.168.28.18	PTR	reverse-not-set.coop.net
206.168.28.35	PTR	reverse-not-set.coop.net
206.168.28.49	PTR	reverse-not-set.coop.net
206.168.28.65	PTR	reverse-not-set.coop.net
206.168.28.82	PTR	reverse-not-set.coop.net
206.168.28.97	PTR	reverse-not-set.coop.net
206.168.28.98	PTR	reverse-not-set.coop.net
206.168.28.112	PTR	reverse-not-set.coop.net
206.168.28.128	PTR	reverse-not-set.coop.net
206.168.28.145	PTR	reverse-not-set.coop.net
206.168.28.176	PTR	reverse-not-set.coop.net
206.168.28.194	PTR	reverse-not-set.coop.net
206.168.28.195	PTR	reverse-not-set.coop.net
206.168.28.209	PTR	reverse-not-set.coop.net
206.168.28.210	PTR	reverse-not-set.coop.net
206.168.28.224	PTR	reverse-not-set.coop.net
206.168.28.241	PTR	reverse-not-set.coop.net
206.168.31.2	PTR	unused-space.coop.net
206.168.31.16	PTR	unused-space.coop.net
206.168.31.118	PTR	unused-space.coop.net
206.168.31.135	PTR	unused-space.coop.net
206.168.31.161	PTR	unused-space.coop.net
206.168.31.194	PTR	unused-space.coop.net
206.168.31.226	PTR	unused-space.coop.net
206.168.31.227	PTR	unused-space.coop.net
206.168.31.240	PTR	unused-space.coop.net