Robtex

Up: 188.75.96.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 188.75.96.0/23
Down right: 188.75.98.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
188.75.96.21	PTR	int0.client.access.fanaptelecom.net
188.75.96.21	A	edgemail.darmanet.ir
188.75.96.62	A	kecmail.com
188.75.96.114	A	mail.imps.ac.ir
188.75.96.152	PTR	int0.client.access.fanaptelecom.net
188.75.97.85	PTR	int0.client.access.fanaptelecom.net
188.75.97.85	A	mail.thmporg.ir
188.75.97.87	PTR	int0.client.access.fanaptelecom.net
188.75.97.133	PTR	int0.client.access.fanaptelecom.net
188.75.97.134	PTR	int0.client.access.fanaptelecom.net
188.75.97.134	A	www.mana.ir
188.75.97.134	A	mana.ir
188.75.97.135	PTR	int0.client.access.fanaptelecom.net
188.75.97.135	A	ns11.hdslines.com
188.75.97.140	PTR	greenshipco.com
188.75.97.140	PTR	hdasco.com
188.75.97.140	PTR	irfleet.com
188.75.98.150	PTR	int0.client.access.fanaptelecom.net
188.75.99.5	PTR	int0.client.access.fanaptelecom.net
188.75.99.5	A	ns1.bmsu.ac.ir
188.75.99.6	PTR	int0.client.access.fanaptelecom.net
188.75.99.6	A	ns2.bmsu.ac.ir
188.75.99.9	A+PTR	mail.bmsu.ac.ir
188.75.99.9	A	mail.najmiyeh.ir
188.75.99.9	A	mail.jhh.ir
188.75.99.10	PTR	mail.bmsu.ac.ir
188.75.99.13	PTR	int0.client.access.fanaptelecom.net
188.75.99.13	A	ns2.baq.ir
188.75.99.13	A	bz2.actiondrivinggame.tk
188.75.99.21	PTR	int0.client.access.fanaptelecom.net
188.75.99.21	A	www.brcgl.com
188.75.99.28	A	4rapid.ir
188.75.99.74	PTR	bmsu.ac.ir
188.75.99.74	PTR	www.bmsu.ac.ir
188.75.99.74	A	najmiyeh.ir
188.75.99.75	PTR	int0.client.access.fanaptelecom.net
188.75.99.75	A	bmsu.ac.ir
188.75.99.75	A	www.bmsu.ac.ir
188.75.99.106	PTR	int0.client.access.fanaptelecom.net
188.75.99.106	A	baq.ir
188.75.99.110	PTR	int0.client.access.fanaptelecom.net
188.75.99.120	A	bmsu.ac.ir