go
ns1.sinet.ir has one IP number , which also has a corresponding reverse pointer. ns1.e-adiran.com and ns1.shdc.sinet.ir point to the same IP. irec.ir, sinet.ir, ir-cme.ir, takta.net, amihot.org and at least 43 other hosts use this as a nameserver. sinet.ir is a domain controlled by two nameservers at sinet.ir themselves. They are on the same IP network. Incoming mail for sinet.ir is handled by one mailserver also at sinet.ir. sinet.ir has one IP number. ns1.sinet.ir is hosted on a server in Iran.

ns1.sinet.ir
a records
 
+ 81.12.12.201 81.12.0.0/19 AS21341 -
+ --- -

sinet.ir
a records
 
+ 81.12.13.165 81.12.0.0/19 AS21341  
+ ---  
ns-soa records
ns1.sinet.ir
+ 81.12.12.201 81.12.0.0/19 AS21341 -
+ --- -
ns records
ns1.sinet.ir
+ 81.12.12.201 81.12.0.0/19 AS21341 -
+ --- -
ns2.sinet.ir
+ 81.12.12.202 81.12.0.0/19 AS21341 -
mx records
postchi.sinet.ir
+ 81.12.12.204 81.12.0.0/19 AS21341 mail.ng-net.com
+ --- mail.ng-net.com
+ --- ns4.shdc.sinet.ir
+ --- -
+ --- libra.shdc.sint.ir
+ --- ns4.sinet.ir
ip numbers of host
81.12.12.201
ptrs of ip numbers
ns1.sinet.ir
ip numbers using ptr to this host
81.12.12.201
hostnames sharing ip with a-records
ns1.e-adiran.com
ns1.shdc.sinet.ir
domains using this as nameserver
107.87.in-addr.arpa
11.12.81.in-addr.arpa
12.12.81.in-addr.arpa
13.12.81.in-addr.arpa
4kidding.com
al-thekr.org
amihot.org
avizoon.com
avizoon.org
avzoon.com
biaclip.net
dlfinder.com
dowran.org
e-adiran.com
ghadeer.org
goonagoon.org
ir-cme.com
ir-cme.ir
ir-cme.net
iran-elearn.com
iran-eschool.com
iran-eschools.com
iranava.ir
iranfaragir.com
iranjukebox.com
iranjukebox.net
iransima.ir
iransoroush.com
iransoroush.net
iranxiran.com
irec.ir
islamic-revolution.net
islamwomen.org
joftak.com
nahadiran.com
nahadiran.ir
nooziva.com
radiosoroush.com
radiosoroush.net
sexyshare.us
shdc.sinet.ir
sinet.ir
takta.net
talkhis.com
xpersia.com
xpersia.net
yazdsima.com
yazdsima.net
domains using this as nameserver under another name
e-adiran.ir
irec.ir
majma.ir
maslahat.ir
maslehat.ir
used as nameserver but missing in parent delegation
irec.ir
used as nameserver but missing in zone
4kidding.com
avzoon.com
dlfinder.com
iranjukebox.net
iransoroush.com
islamic-revolution.net
joftak.com
talkhis.com
yazdsima.com
yazdsima.net