DNS delegation of fastsearch.com updated: May 25, 2013 10:03:55 AM
Delegation
step
query
auth
servers
1
fastsearch.com.
.
(j,h,d,k,a,c,e,m,l,g,b,i,f).root-servers.net.
2
fastsearch.com.
com.
(f,g,i,m,e,b,k,l,d,c,j,a,h).gtld-servers.net.
3
fastsearch.com.
fastsearch.com.
(ns5,ns1,ns4,ns3,ns2).msft.net.
We pick j.root-servers.net, one of the 13 root servers (1), and ask it about fastsearch.com and learn that com is delegated to 13 name servers (2), so we ask f.gtld-servers.net where we learn that fastsearch.com is delegated to five name servers, including ns5.msft.net (3), so we ask that one and get the following answer:
Six percent of them use the three name servers ns1, ns2 and ns5.msft.net together (but neither ns3 nor ns4.msft.net ), hereafter referred to as "name server group 2", (example: surface.ca, hyper-v.com.br and msn.ht ). Worth noting is that all of the domains that use name server group 2 use the primary name server ns1.msft.net.
The five name servers ns1, ns2, ns3, ns4 and ns5.msft.net together
There are several thousand of domains that use name server group 1.
The two IPv4 numbers 64.4.11.37 and 65.55.58.201 together
There are several hundred of domains that use IPv4 group 1.
Every fifth of those use the three name servers ns1, ns3 and ns4.msft.net together (but neither ns2 nor ns5.msft.net ), hereafter referred to as "name server group 3", (example: office365.com.pl, dsin.de and windowsvista.fr ). Worth noting is that twelve percent of the domains that use name server group 3 use IPv4 group 1.