Robtex

Up: 77.81.76.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 77.81.76.0/25
Down right: 77.81.76.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.81.76.20	PTR	shmu.ac.ir
77.81.76.20	PTR	mail.shmu.ac.ir
77.81.76.20	A	mail.shecs.info
77.81.76.38	A+PTR	cong.shmu.ac.ir
77.81.76.50	A+PTR	bahar.shmu.ac.ir
77.81.76.50	A+PTR	shmu.ac.ir
77.81.76.180	A+PTR	mail.shmu.ac.ir