Robtex

Up: 151.239.232.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 151.239.232.0/23
Down right: 151.239.234.0/23

IP	Type	Hostname
151.239.232.195	PTR	151-239-232-195.rasana.net
151.239.233.128	PTR	151-239-233-128.rasana.net
151.239.233.190	PTR	151-239-233-190.shatel.ir
151.239.235.6	PTR	151-239-235-6.rasana.net
151.239.235.171	PTR	151-239-235-171.rasana.net