DNS delegation of hotmail.hk updated: May 25, 2013 9:21:53 AM
Delegation
step
query
auth
servers
1
hotmail.hk.
.
(k,h,l,i,j,m,g,f,c,b,d,a,e).root-servers.net.
2
hotmail.hk.
hk.
(t,b,y,x,v,w,s,a,z,u).hkirc.net.hk.
3
hotmail.hk.
hotmail.hk.
(ns4,ns3,ns2).msft.net.
We pick k.root-servers.net, one of the 13 root servers (1), and ask it about hotmail.hk and learn that hk is delegated to ten name servers (2), so we ask t.hkirc.net.hk where we learn that hotmail.hk is delegated to three name servers, including ns4.msft.net (3), so we ask that one and get the following answer:
Hotmail.hk is a domain controlled by five domain name servers at msft.net having a total of ten IP numbers. Some of them are on the same IP network. Incoming mail for hotmail.hk is handled by four mail servers at hotmail.com having a total of twelve IP numbers. There are 36 duplicated IP numbers. All twelve of them are on the same IP network. Hotmail.hk has four IP numbers (65.55.143.16, 65.55.143.17, 65.55.129.173, 65.55.129.171). All four of them are on the same IP network.
Eleven of them use the mail server mx4.hotmail.com. Worth noting is that eleven of the domains that use the mail server mx4.hotmail.com point to the IP number 65.55.129.173.
Eleven of them use the mail server mx3.hotmail.com. Worth noting is that eleven of the domains that use the mail server mx3.hotmail.com point to the IP number 65.55.129.173.
The five name servers ns1, ns2, ns3, ns4 and ns5.msft.net together
Eleven of them use the mail server mx1.hotmail.com. Worth noting is that nine of the domains that use the mail server mx1.hotmail.com point to the IP number 65.55.143.17.
The four mail servers mx1, mx2, mx3 and mx4.hotmail.com together
There are more than hundred domains that use mail server group 1.
