go
gsi.ir is delegated to two nameservers, however both delegated nameservers are missing in the zone. All nameservers are at iagroups.com. They are on different IP networks. www.gsi.ir cnames to this hostname. gsi-iran.org, iagroups.com and sarafrazanvatan.ir share nameservers with this domain. www.gsi.ir, mail.gsi.ir and mx-213-207-205-90.gsi.ir are subdomains to this hostname.

gsi.ir
ns records
ns5.iagroups.com
+ 69.59.21.167 69.59.16.0/20 AS13618 unknown.carohosting.net
+ --- unknown.carohosting.net
ns6.iagroups.com
+   AS?  
+ ---  

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 -
+ --- -
hostnames pointing here by cname
www.gsi.ir
nameservers used by this domain
ns5.iagroups.com
ns6.iagroups.com
domains sharing nameservers
gsi-iran.org
iagroups.com
sarafrazanvatan.ir
ip numbers of nameservers
69.59.21.167
reverse names of the nameservers
unknown.carohosting.net
other names of the nameservers
iagroups.com
ikhwanweeb.com
ns1.ikhwanweeb.com
domains sharing nameservers under another name
ikhwanweb.org
ikhwanweeb.com
subdomains
*.gsi.ir
mail.gsi.ir
mx-213-207-205-90.gsi.ir
www.gsi.ir
nameservers missing in zone
ns5.iagroups.com
ns6.iagroups.com