Unrestricted vs. restricted domain names
- Unrestricted Domains
Many of the domains, such as .com, .org, and .net, are open to anyone who wants to register them. As a result, the division between top-level domains is not always clear cut. Sometimes non-profit organizations and educational institutions are found under .com or .net.
- Restricted Domains
Certain top-level domains are reserved for particular uses. The .gov domain is reserved for U.S. governmental bodies, .edu is reserved for accredited U.S. institutions of higher education.
- Country Codes
Sometimes top-level domains represent nations—for instance, .us for USA, .uk for the UK, or .cn for China. While these often reflect what part of the world the information is coming from, in some cases countries have allowed their names to be registered widely.