Robtex

Up: 80.253.136.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 80.253.140.0/23
Down right: 80.253.142.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
80.253.140.29	PTR	int0.client.access.azadnet.net
80.253.140.35	PTR	int0.client.access.fanaptelecom.net
80.253.140.88	PTR	int0.client.access.fanaptelecom.net
80.253.140.132	A	mail.wsi-oilfield.com
80.253.140.136	PTR	int0.client.access.fanaptelecom.net
80.253.140.194	PTR	int0.client.access.fanaptelecom.net
80.253.141.5	A+PTR	amail.goldiscorp.com
80.253.141.7	A	amailedge16.goldiscorp.com
80.253.141.100	PTR	eth0.mrt.access.cdsm-3-2.hft.azadnet.net
80.253.141.100	A	ariga.hoornet.com
80.253.141.100	A	arpa.hoornet.com
80.253.141.115	PTR	taalawfirm.com
80.253.141.116	PTR	omega-technologies.com
80.253.141.118	PTR	behboo.com
80.253.141.122	PTR	golgouneh.com
80.253.141.125	PTR	chimyagostar.com
80.253.141.136	PTR	int0.client.access.azadnet.net
80.253.141.166	PTR	int0.client.access.fanaptelecom.net
80.253.141.176	PTR	int0.client.access.fanaptelecom.net
80.253.141.188	PTR	int0.client.access.azadnet.net
80.253.141.188	A	mail.badrelectric.com
80.253.141.189	PTR	mail.badr-electric.com
80.253.141.190	A	mail.badr-group.com
80.253.141.198	PTR	int0.client.access.fanaptelecom.net
80.253.141.227	PTR	int0.client.access.fanaptelecom.net
80.253.141.247	PTR	int0.client.access.azadnet.net
80.253.141.249	PTR	int0.client.access.azadnet.net
80.253.142.43	PTR	int0.client.access.fanaptelecom.net
80.253.142.178	PTR	int0.client.access.fanaptelecom.net
80.253.142.210	PTR	int0.client.access.azadnet.net
80.253.143.11	A	www.iidtech.net
80.253.143.14	PTR	int0.client.access.azadnet.net
80.253.143.14	A	mail.iidtech.net
80.253.143.14	A	exchange.iidtech.net
80.253.143.15	PTR	int0.client.access.fanaptelecom.net
80.253.143.47	PTR	int0.client.access.fanaptelecom.net
80.253.143.88	PTR	int0.client.access.fanaptelecom.net
80.253.143.124	PTR	int0.client.access.fanaptelecom.net
80.253.143.232	PTR	int0.client.access.azadnet.net
80.253.143.254	PTR	int0.client.access.fanaptelecom.net
80.253.143.255	PTR	int0.client.access.fanaptelecom.net