DNS Root Servers

What are the root servers? These are the DNS servers from which all others get information.

Why would anyone care? To verify the information other mail systems see when trying to reach your SMTP domain.

How do I use the information? You can force NSLookup to poll a particular DNS server by using the command:
server ip_address or server fqdn

As an example, open a command prompt window
At the prompt, type nslookup
Type the command set type = mx
Type the command server a.root-servers.net
Type the registered domain name (e.g. domain.com)

You have requested the MX information for domain.com directly from one of the DNS root servers.

Here is IP information for the thirteen (13) root servers.
a.root-servers.net   198.41.0.4
b.root-servers.net   192.228.79.201
c.root-servers.net   192.33.4.12
d.root-servers.net   128.8.10.90
e.root-servers.net   192.203.230.10
f.root-servers.net   192.5.5.241
g.root-servers.net   192.112.36.4
h.root-servers.net   128.63.2.53
i.root-servers.net   192.36.148.17
j.root-servers.net   192.58.128.30
k.root-servers.net   193.0.14.129
l.root-servers.net   198.32.64.12
m.root-servers.net   202.12.27.33

The complete information can be found at the website: http://www.root-servers.org