Domains

What is a Domain?

On the Internet, a domain is a space with a specific address. For instance, the domain name example.com might translate to the physical address 198.102. 434.8.

Other examples of domain names are google.com and wikipedia.org. Using a domain name to identify a location on the Internet rather than the numeric IP address makes it much easier to remember and type web addresses.

What is the difference between a domain and a website?

A website is a collection of web pages used to display information to users. A Domain name is basically the name or address of the website that users type in URL to visit a website.

History

The first commercial Internet domain name, in the TLD com, was registered on 15 March 1985 under the name symbolics.com by Symbolics Inc., a computer systems firm in Cambridge, Massachusetts.

By 1992, fewer than 15,000 com domains had been registered.

In the first quarter of 2015, 294 million domain names had been registered. 

As of December 31, 2023, 359.8 million domain names had been registered

The domain I want is already taken. How can I know who registered it?

Top-Level Domains (TLDs)
In 1985, The Internet Assigned Numbers Authority (IANA) released six top-level domain names. These top-level domains (TLD) became known as domain name extensions and represent the highest level in the Domain Name System hierarchy. They include:

.com: shorthand for commercial, .com was the first top-level domain in common use. While .com was initially created for use by commercial organizations, restrictions on this were not stringent. By the mid-1990s, .com had become the most popular and commonly used type of top-level domain for businesses, websites, and email.

.net: shorthand for network, .net was created expressly for institutes that partook in network technologies such as an internet service provider or an infrastructure company. Like with .com, the restrictions meant to limit .net to networking purposes were never upheld and it became one of the more popular top-level domains, with many seeing it as a close second to using the .com top-level domain.

.edu: shorthand for education, .edu was made for education institutions. Although it was intended for universities everywhere, the TLD .edu became associated with only educational centers in America. Schools from other countries will use .edu in conjunction with their country-level domain, which we will discuss in the next section below.

.org: shorthand for organization, .org was created for nonprofits. As we’ve seen with these other top-level domains, such intentions were often not upheld or enforced over time. These days .org is used as a top-level domain by nonprofits, for-profit businesses, schools, and communities.

.mil: shorthand for military, .mil was created expressly for U.S. military branches. Unlike the other different types of top-level domains, this restriction is still upheld. Now, it is quite common for .mil to use second and third-level domains in conjunction with the .mil TLD.

.gov: shorthand for government, .gov, like .mil, was restricted for American federal governmental agencies and personnel use only. These days .gov is used by governmental agencies, programs, cities, states, towns, counties, and Native American tribes.

Internationalized country code top-level domains (IDN ccTLD)
This was a top-level name with an encoded format that lets non-Latin character sets or other special characters be used.

Generic top-level domains (gTLD)
Generic top-level domains function as a category of top-level domains within the DNS. As of now, there are currently 21 generic top-level domains within the root zone, which is the highest level of the domain name system structure.

While there are over 1,500 gTLDs in use, these 21 make up the vast majority of all types of domain names.