Robtex

Up: 151.247.248.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 151.247.252.0/23
Down right: 151.247.254.0/23

IP	Type	Hostname
151.247.252.0	PTR	151-247-252-0.shatel.ir
151.247.252.202	PTR	151-247-252-202.shatel.ir
151.247.254.136	PTR	151-247-254-136.shatel.ir
151.247.254.224	PTR	151-247-254-224.shatel.ir
151.247.255.174	PTR	151-247-255-174.shatel.ir
151.247.255.255	PTR	151-247-255-255.rasana.net