DNS delegation of yahoopersonals.dk updated: May 18, 2013 11:07:30 PM
Delegation
step
query
auth
servers
1
yahoopersonals.dk.
.
(b,i,k,l,j,d,c,f,e,m,a,h,g).root-servers.net.
2
yahoopersonals.dk.
dk.
(l,a,c,b,p,s).nic.dk.
3
yahoopersonals.dk.
yahoopersonals.dk.
(ns1,ns3,ns5,ns2,ns4).yahoo.com.
We pick b.root-servers.net, one of the 13 root servers (1), and ask it about yahoopersonals.dk and learn that dk is delegated to six name servers (2), so we ask l.nic.dk where we learn that yahoopersonals.dk is delegated to five name servers, including ns1.yahoo.com (3), so we ask that one and get the following answer:
Two thirds of them use IPv4 group 1 (example: encmpss5.com, yahoo-inv.biz and yahooalagoons.com ). Worth noting is that most of the domains that use IPv4 group 1 use name server group 1.
The mail server. Only
There are several thousand of domains that only use the mail server ..