Robtex

Up: 5.160.90.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 5.160.91.0/25
Down right: 5.160.91.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
5.160.91.4	A	mail.mahan-safar.com
5.160.91.6	A+PTR	mail.mahaansafar.com
5.160.91.10	PTR	mail.setuda.ir
5.160.91.34	PTR	mail.nikparvaz.net
5.160.91.35	PTR	mail.nikparvaz.org
5.160.91.66	A	ns2.novindemo.ir
5.160.91.66	A	e70.ir
5.160.91.66	A	www.e70.ir
5.160.91.150	A	www.aseman.tv
5.160.91.150	A	ns1.asemanisd.ir
5.160.91.235	A+PTR	mail.rpseir.com