DNS delegation of mobile.tel updated: Jun 20, 2013 11:40:39 AM
Delegation
step
query
auth
servers
1
mobile.tel.
.
(i,k,e,h,f,a,g,l,b,c,j,d,m).root-servers.net.
2
mobile.tel.
tel.
(b,f,g,h,d,a,c,e).dns.nic.tel.
3
mobile.tel.
mobile.tel.
(a0,s0,d0,t0,n0).cth.dns.nic.tel.
We pick i.root-servers.net, one of the 13 root servers (1), and ask it about mobile.tel and learn that tel is delegated to eight name servers (2), so we ask b.dns.nic.tel where we learn that mobile.tel is delegated to five name servers, including a0.cth.dns.nic.tel (3), so we ask that one and get the following answer:
Three percent of them use the two mail servers mx00 and mx01.udag.de together, hereafter referred to as "mail server group 2", (example: emmendingen.tel and dmail.tel ).
The five name servers a0, d0, n0, s0 and t0.cth.dns.nic.tel together
Three percent of them use mail server group 2 (example: ibrahim.tel and sinn.tel ).
The IP number 194.77.54.2 only
There are several thousand of host names that point only to the IP number 194.77.54.2.
Three quarter of those use name server group 1 (example: cmt.tel, noname.tel and smurfitkappa.tel ). Worth noting is that most of the domains that use name server group 1 point only to the IP number 194.77.54.2.
Five percent of them use mail server group 1 (example: toma.tel ).