Robtex

Up: 80.253.152.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 80.253.152.0/23
Down right: 80.253.154.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
80.253.152.72	PTR	int0.client.access.fanaptelecom.net
80.253.152.154	PTR	int0.client.access.fanaptelecom.net
80.253.152.158	PTR	int0.client.access.fanaptelecom.net
80.253.152.161	PTR	int0.client.access.fanaptelecom.net
80.253.152.178	PTR	int0.client.access.fanaptelecom.net
80.253.152.184	PTR	int0.client.access.fanaptelecom.net
80.253.152.203	PTR	int0.client.access.azadnet.net
80.253.152.204	PTR	int0.client.access.azadnet.net
80.253.152.210	PTR	int0.client.access.azadnet.net
80.253.153.9	PTR	int0.client.access.azadnet.net
80.253.153.12	PTR	int0.client.access.azadnet.net
80.253.153.19	PTR	int0.client.access.azadnet.net
80.253.153.64	PTR	int0.client.access.fanaptelecom.net
80.253.153.133	PTR	int0.client.access.azadnet.net
80.253.153.231	PTR	int0.client.access.fanaptelecom.net
80.253.153.235	PTR	int0.client.access.fanaptelecom.net
80.253.153.235	A	payment.azadnet.net
80.253.153.240	PTR	int0.client.access.azadnet.net
80.253.153.242	A	mail.ecd-club.ir
80.253.153.243	PTR	int0.client.access.fanaptelecom.net
80.253.153.243	A	portugaltranslations.net
80.253.153.251	PTR	int0.client.access.fanaptelecom.net
80.253.153.251	A	golvazheh.com
80.253.153.251	A	www.golvazheh.com
80.253.154.6	PTR	int0.client.access.azadnet.net
80.253.154.15	PTR	int0.client.access.fanaptelecom.net
80.253.154.18	PTR	int0.client.access.azadnet.net
80.253.154.18	A	ns1.isrc.ac.ir
80.253.154.18	A	ns2.isrc.ac.ir
80.253.154.19	PTR	int0.client.access.azadnet.net
80.253.154.19	A	mail.isrc.ac.ir
80.253.154.19	A	srv-iexch01.isrc.ac.ir
80.253.154.21	PTR	int0.client.access.fanaptelecom.net
80.253.154.21	A	www.isrc.ac.ir
80.253.154.21	A	isrc.ac.ir
80.253.154.23	PTR	int0.client.access.fanaptelecom.net
80.253.154.27	A	iochiz.com
80.253.154.47	PTR	int0.client.access.fanaptelecom.net
80.253.154.75	PTR	int0.client.access.fanaptelecom.net
80.253.154.96	PTR	int0.client.access.fanaptelecom.net
80.253.154.102	PTR	int0.client.access.fanaptelecom.net
80.253.154.129	PTR	int0.client.access.azadnet.net
80.253.154.145	PTR	int0.client.access.fanaptelecom.net
80.253.154.188	PTR	int0.client.access.azadnet.net
80.253.154.195	PTR	int0.client.access.azadnet.net
80.253.154.206	PTR	int0.client.access.fanaptelecom.net
80.253.154.228	PTR	int0.client.access.fanaptelecom.net
80.253.155.10	PTR	int0.client.access.fanaptelecom.net
80.253.155.10	A	mail.hemahotel.nl
80.253.155.10	A	stormware.media-management.at
80.253.155.55	PTR	int0.client.access.fanaptelecom.net
80.253.155.120	PTR	mail.csp.ir
80.253.155.120	A	mail.csptube.ir
80.253.155.120	A	mindbodybottle.com
80.253.155.121	PTR	int0.client.access.fanaptelecom.net
80.253.155.126	PTR	int0.client.access.fanaptelecom.net
80.253.155.169	PTR	int0.client.access.azadnet.net
80.253.155.203	PTR	int0.client.access.azadnet.net
80.253.155.243	PTR	int0.client.access.azadnet.net