DNS delegation of cnr.ir updated: May 19, 2013 3:51:42 AM
ns.irnic.ir. ns5.univie.ac.at. a.nic.ir.
We pick f.root-servers.net, one of the 13 root servers (1), and ask it about cnr.ir and learn that ir is delegated to three name servers (2), so we ask ns.irnic.ir where we learn that cnr.ir is delegated to two name servers, including ns1.bijax.org (3), so we ask that one and get the following answer:
Three of the four domains that only use the IPv4 number 220.127.116.11 use name server group 1. Worth noting is that all of the domains that use name server group 1 use only the IPv4 number 18.104.22.168.