Domain Name Check
A DNS database is like a phone book of host names.
All these databases are
linked so that when you are trying to get resolution, the DNS server that tries to
get resolution for you might get directed from one DNS server to another until
you either get resolution or you find out you can�t get resolution.
The DNS system is similar to
an environment in which all telephone information operators are linked together
so that your request can get passed to the appropriate operator.
All the URLs that you need to get resolution
for on the Internet are in a DNS
database somewhere. A DNS database
administrator has entered the name and IP
address into the database.
DNS lookup - DNS Records