DNS delegation of s9a1.pstmp.com updated: Jun 19, 2013 6:10:02 AM
Delegation
step
query
auth
servers
1
s9a1.pstmp.com.
.
(j,d,e,f,l,k,g,b,c,h,m,a,i).root-servers.net.
2
s9a1.pstmp.com.
com.
(i,h,c,e,f,k,j,b,l,a,m,d,g).gtld-servers.net.
3
s9a1.pstmp.com.
pstmp.com.
(exp3,exp4).above.com.
We pick j.root-servers.net, one of the 13 root servers (1), and ask it about s9a1.pstmp.com and learn that com is delegated to 13 name servers (2), so we ask i.gtld-servers.net where we learn that pstmp.com is delegated to two name servers, including exp3.above.com (3), so we ask that one and get the following answer:
All of the several thousand of domains that use the primary name server ns1.above.com use name server group 1 (example: myattyahoo.net, ns.starthomepage.com and howtosetup.in ). Worth noting is that three quarter of the domains that use name server group 1 use the primary name server ns1.above.com.
The two name servers ns1 and ns2.above.com together
There are several thousand of domains that use name server group 1.