Robtex

Up: 81.29.240.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 81.29.244.0/23
Down right: 81.29.246.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.29.244.4	PTR	int0.client.access.fanaptelecom.net
81.29.244.26	PTR	int0.client.access.fanaptelecom.net
81.29.244.26	A	www.kiau.ac.ir
81.29.244.26	A	*.kiau.ac.ir
81.29.244.176	PTR	kiau.ac.ir
81.29.244.176	A	mathscience.kiau.ac.ir
81.29.244.176	A	mail.kiau.ac.ir
81.29.244.229	A	ns1.allreplica.net
81.29.245.70	PTR	int0.client.access.fanaptelecom.net
81.29.245.76	PTR	int0.client.access.fanaptelecom.net
81.29.246.62	A	ns2.allreplica.net
81.29.246.99	PTR	int0.client.access.fanaptelecom.net
81.29.246.99	A	www.eri.ac.ir
81.29.246.99	A	eri.ac.ir
81.29.247.26	A	mail.karkojast.com
81.29.247.50	PTR	int0.client.access.fanaptelecom.net
81.29.247.181	A+PTR	mail.payamgroups.com
81.29.247.181	A	mail.in2025.com
81.29.247.181	A	mail.ispmasih.com