go
ns2.itc.ir and ns1.itc.ir are subdomains to this hostname.

ir
ns-soa records
ns1.nic.ir
+ 194.225.70.83 194.225.64.0/19 AS6736  
+ ---  
ns records
auth02.ns.uu.net
+ 198.6.1.82 198.6.0.0/16 AS701 -
+ --- -
a.nic.ir
+ 193.189.123.2 193.189.123.0/24 AS39200 -
ns1.nic.ir
+ 194.225.70.83 194.225.64.0/19 AS6736  
+ ---  
ns5.univie.ac.at
+ 193.171.255.77 193.170.0.0/15 AS1853 -
+ --- -
subdomains
ns1.itc.ir
ns2.itc.ir