Robtex

Up: 80.253.144.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 80.253.148.0/23
Down right: 80.253.150.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
80.253.148.77	PTR	int0.client.access.fanaptelecom.net
80.253.148.102	PTR	int0.client.access.azadnet.net
80.253.148.113	PTR	int0.client.access.fanaptelecom.net
80.253.148.169	PTR	int0.client.access.azadnet.net
80.253.148.169	A	mail.samanpr.ir
80.253.148.169	A	mail.samanpr.com
80.253.148.194	PTR	int0.client.access.azadnet.net
80.253.148.204	PTR	mail.seagloryiran.com
80.253.148.204	A	mail1.parsoceanservices.com
80.253.148.204	A	mail1.seagloryservices.com
80.253.148.230	A	mail.sahandnaftiran.com
80.253.149.21	PTR	int0.client.access.fanaptelecom.net
80.253.149.21	A	mail1.mazandarya.com
80.253.149.21	A	mail1.nikresan.com
80.253.149.38	PTR	int0.client.access.fanaptelecom.net
80.253.149.55	PTR	int0.client.access.fanaptelecom.net
80.253.149.58	PTR	tehran.abcterminal.com
80.253.149.58	A	tehrann.tttcot.com
80.253.149.58	A	tehrann.abcterminal.com
80.253.149.61	PTR	tehranmain.abcterminal.com
80.253.149.61	A	md.abcterminal.com
80.253.149.132	PTR	int0.client.access.fanaptelecom.net
80.253.149.209	PTR	int0.client.access.fanaptelecom.net
80.253.150.6	PTR	int0.client.access.azadnet.net
80.253.150.26	A	mail.fakhergroup.com
80.253.150.29	PTR	int0.client.access.fanaptelecom.net
80.253.150.85	PTR	int0.client.access.fanaptelecom.net
80.253.150.92	PTR	int0.client.access.azadnet.net
80.253.150.95	PTR	int0.client.access.azadnet.net
80.253.150.146	PTR	webmail.parshayat.com
80.253.150.146	A	mail1.papia.ir
80.253.150.147	PTR	webmail.parshayat.com
80.253.150.147	A	mail.parshayat.com
80.253.150.150	PTR	mail1.parshayat.ir
80.253.151.14	A	doctorkarimi.com
80.253.151.14	A	sahargas.com
80.253.151.14	A	amozesheshahrvandi.ir
80.253.151.24	PTR	int0.client.access.azadnet.net
80.253.151.24	A	ns2.witturiran.com
80.253.151.24	A	witturiran.com
80.253.151.26	PTR	int0.client.access.azadnet.net
80.253.151.37	PTR	int0.client.access.fanaptelecom.net
80.253.151.106	PTR	int0.client.access.fanaptelecom.net
80.253.151.156	PTR	int0.client.access.fanaptelecom.net
80.253.151.170	PTR	int0.client.access.azadnet.net
80.253.151.214	PTR	int0.client.access.azadnet.net
80.253.151.216	PTR	int0.client.access.fanaptelecom.net