Robtex

Up: 5.160.88.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 5.160.92.0/23
Down right: 5.160.94.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
5.160.92.100	PTR	mail.wssshpg.com
5.160.92.167	PTR	mail.meditechsys.com
5.160.92.167	PTR	mail.novatisteb.com
5.160.92.167	PTR	mail.medwayteb.com
5.160.92.171	A	icdgroup.co
5.160.92.171	A	medcina.com
5.160.93.4	A	mail.sport.ir
5.160.93.5	PTR	mail.sfg.ir
5.160.93.5	PTR	mail.rahkar365.ir
5.160.93.5	PTR	mail.rastaedg.com
5.160.93.7	A	sportsalary.ir
5.160.93.147	A	ksb-iran.com
5.160.93.162	PTR	mail.rooeein.co.ir
5.160.93.178	A	exch-edge.pldmmall.com
5.160.93.178	A	webmail.pldmmall.com
5.160.93.178	A	mail.pldmmall.com
5.160.93.179	PTR	webmail.pldmmall.com
5.160.93.189	A	ns1.pldmmall.com
5.160.93.190	A	ns2.pldmmall.com
5.160.94.11	A	jahad-vat.ir
5.160.94.11	A	ns2.jahad-vat.ir
5.160.94.11	A	ns1.jahad-vat.ir
5.160.94.20	PTR	mail.stratusgc.com
5.160.94.20	A	stratusgc.com
5.160.94.123	A	sandoghhamyar.com
5.160.94.123	A	www.unisys.ir
5.160.94.123	A	mail.sandoghhamyar.com
5.160.94.227	A	ns2.icbs.ir
5.160.94.229	A	www.icbs.ir
5.160.94.229	A	icbs.ir
5.160.94.229	A	www.etebarsanjisaman.com
5.160.94.230	A+PTR	mail.icbs.ir
5.160.94.239	A	www.mizanto.com
5.160.95.31	A	www.ppo.ir
5.160.95.70	A	nortonantivirus.es
5.160.95.70	A	mail.iripp.ir
5.160.95.73	A	ns2.iripp.ir
5.160.95.73	A	*.iripp.ir
5.160.95.73	A	kep.com.ar
5.160.95.214	A+PTR	mail.opfic.com