Robtex

Up: 77.237.80.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 77.237.80.0/23
Down right: 77.237.82.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
77.237.82.7	A	ns1.tehranedu.com
77.237.82.7	A	tehranedu.com
77.237.82.7	A	www.tehranedu.org
77.237.82.8	A	ns2.tehranedu.com
77.237.82.202	A	ns1.tehranedu.org
77.237.82.203	A	ns2.tehranedu.org
77.237.83.34	PTR	mail.mmte.ir