Robtex

Up: 81.90.144.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 81.90.144.0/22
Down right: 81.90.148.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
81.90.144.20	A	e-mail.bgiholdings.com
81.90.144.20	A	mail1.bginternal.com
81.90.144.20	A	ts-mail.butaneportal.com
81.90.144.26	A	ns2.bginternal.com
81.90.144.26	A	ns1.bginternal.com
81.90.144.146	A	new.hilandbeauty.com
81.90.144.254	A	ns2.sabairib.ir
81.90.144.254	A	ns1.sabairib.ir
81.90.148.45	A	ibbc.ir
81.90.148.140	A+PTR	ms.exirnovinco.com
81.90.148.140	A	mail.nipna.ir
81.90.148.140	A	mail.payampetro.ir
81.90.149.18	A	hamyaraval.site
81.90.149.21	A+PTR	mail.hamyaraval.site
81.90.149.38	A	mail.notsore.com
81.90.149.38	A	*.sepacodarou.com
81.90.149.38	A	healthburst.org
81.90.149.100	PTR	ms2.havayar.com
81.90.149.100	A	mail.havayar.info
81.90.149.100	A	mail.havayar.biz
81.90.149.122	A+PTR	mx01.digikala.com
81.90.149.122	A	mail.digikala.com
81.90.149.162	A+PTR	teta.net
81.90.149.162	A	mail.teta.net
81.90.149.195	A+PTR	ns2.lalehgostar.com
81.90.149.195	A	ns2.jalilian-ielts.com
81.90.149.195	A	ns2.kanpazhohan.com
81.90.150.3	A	sbkiran.ir
81.90.150.3	A	www.aiiri.gov.ir
81.90.150.3	A	aiiri.gov.ir
81.90.150.110	A	mailgw.aiiri.gov.ir
81.90.150.110	A	mailgw.sabka.ir
81.90.150.110	A	mailgw.sbkiran.ir
81.90.150.135	A	dnssrv1.aiiri.gov.ir
81.90.150.135	A	mail.irenmex-construcciones.com
81.90.151.11	A	vsrv-dc01.nww.ir
81.90.151.26	A	www.nww.ir
81.90.151.26	A	isrc.nww.ir
81.90.151.34	A+PTR	mail.nww.ir
81.90.151.34	A	vsrv-mail.nww.ir
81.90.151.34	A	resmetrix.com
81.90.151.170	A	www.nncgs1.com
81.90.151.170	A	nncgs1.ir
81.90.151.170	A	iransatak.ir