Robtex

Up: 86.109.48.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 86.109.48.0/22
Down right: 86.109.52.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
86.109.48.38	PTR	int0.client.access.fanaptelecom.net
86.109.48.38	A	mail.kolondoor.ir
86.109.48.38	A	mail.kolonservice.ir
86.109.48.50	PTR	int0.client.access.fanaptelecom.net
86.109.48.50	A	webmail.irabb.com
86.109.48.255	PTR	int0.client.access.fanaptelecom.net
86.109.49.7	PTR	mail.ertb.ir
86.109.49.7	A	ertb.ir
86.109.49.8	PTR	int0.client.access.fanaptelecom.net
86.109.49.8	A	www.ertb.ir
86.109.49.63	PTR	int0.client.access.fanaptelecom.net
86.109.49.64	PTR	int0.client.access.fanaptelecom.net
86.109.49.95	PTR	int0.client.access.fanaptelecom.net
86.109.49.96	PTR	int0.client.access.fanaptelecom.net
86.109.49.111	PTR	int0.client.access.fanaptelecom.net
86.109.49.112	PTR	int0.client.access.fanaptelecom.net
86.109.49.127	PTR	int0.client.access.fanaptelecom.net
86.109.49.128	PTR	int0.client.access.fanaptelecom.net
86.109.49.159	PTR	int0.client.access.fanaptelecom.net
86.109.49.195	A+PTR	mail.mapnaom-zr.com
86.109.49.201	PTR	int0.client.access.fanaptelecom.net
86.109.49.201	A	kashancement.com
86.109.49.201	A	www.kashancement.com
86.109.49.203	PTR	int0.client.access.torange.com
86.109.49.203	A	mailedge.kashancement.com
86.109.50.21	A+PTR	mail.badrsun.com
86.109.50.21	A	linda-voss.com
86.109.50.21	A	97daodao.com
86.109.50.34	PTR	int0.client.access.fanaptelecom.net
86.109.50.51	PTR	int0.client.access.fanaptelecom.net
86.109.50.142	PTR	int0.client.access.azadnet.net
86.109.51.200	A+PTR	mailir.aujan.ir
86.109.52.121	PTR	broadband.customer.azadnet.net
86.109.53.212	PTR	int0.client.access.azadnet.net
86.109.54.52	PTR	int0.client.access.fanaptelecom.net