A domain name has a number of components.

For example, this domain name:


has the following components:

www indicates it is a worldwide web address

address is the domain name that you register

com indicates the category of domain name you have registered, and is called a top level domain name

cn indicates the country of origin (also known as a country code top-level domain), namely Mainland China in this example.

Other top level domain names include:

In Hong Kong it is not unusual for a domain name to be registered without any top level domain name. In that case, the domain name could be registered as:

The following domain name for example does not show a country of origin: