DNS delegation of adsbygoogle.com updated: Jun 20, 2013 3:26:27 AM
Delegation
step
query
auth
servers
1
adsbygoogle.com.
.
(g,h,b,c,l,j,f,e,a,d,m,i,k).root-servers.net.
2
adsbygoogle.com.
com.
(b,k,c,j,m,g,f,d,a,e,i,l,h).gtld-servers.net.
3
adsbygoogle.com.
adsbygoogle.com.
(ns3,ns2,ns4,ns1).google.com.
We pick g.root-servers.net, one of the 13 root servers (1), and ask it about adsbygoogle.com and learn that com is delegated to 13 name servers (2), so we ask b.gtld-servers.net where we learn that adsbygoogle.com is delegated to four name servers, including ns3.google.com (3), so we ask that one and get the following answer:
The four name servers ns1, ns2, ns3 and ns4.google.com together
About one in six of the more than a thousands domains that use name server group 1 use mail server group 1 (example: hantro.com, dartlang.org and ourstories.org ).