Domain Name

May 20, 2023

A domain name is the unique identifier of a website on the Internet. It is the address that people use to access a website, and it usually consists of two parts: the name of the website and the top-level domain (TLD). For example, in the domain name “,” “google” is the website name and “.com” is the TLD.


The purpose of a domain name is to provide a memorable and meaningful way to access a website. It is much easier to remember a domain name than an IP address, which is the numerical address that computers use to communicate with each other. In addition, a domain name provides a way to identify a website’s owner or operator.


Domain names are used in URLs (Uniform Resource Locators), which are the addresses that people type into their web browsers to access a website. For example, the URL for Google’s homepage is “”. The domain name in this URL is “”.

Domain names are also used in email addresses. For example, a person’s email address might be “”. The domain name in this email address is “”.


A subdomain is a domain that is part of a larger domain. For example, in the domain name “,” “mail” is a subdomain of “”. Subdomains are often used to organize website content or to create separate sections of a website. For example, a company might have a subdomain for its blog at “”.

Top-level Domains

A top-level domain (TLD) is the part of a domain name that comes after the last dot. For example, in the domain name “,” “.com” is the TLD. There are two types of TLDs: generic TLDs (gTLDs) and country-code TLDs (ccTLDs).

Generic TLDs

A generic TLD is a TLD that is not associated with a specific country. Some examples of gTLDs include:

  • .com – Commercial businesses
  • .org – Non-profit organizations
  • .net – Network infrastructure providers
  • .edu – Educational institutions
  • .gov – U.S. government agencies

Country-code TLDs

A country-code TLD (ccTLD) is a TLD that is associated with a specific country. Some examples of ccTLDs include:

  • .us – United States
  • .ca – Canada
  • .uk – United Kingdom
  • .de – Germany
  • .jp – Japan

Domain Name System (DNS)

The Domain Name System (DNS) is a hierarchical system for naming resources on the Internet. It translates domain names into IP addresses so that computers can communicate with each other. When a user types a domain name into their web browser or email client, the DNS system resolves the domain name to an IP address.

The DNS system consists of a distributed database of domain name servers. These servers contain information about domain names and their corresponding IP addresses. When a user requests a domain name, their computer sends a query to a DNS server. If the DNS server has the information in its database, it returns the IP address to the user’s computer. If the DNS server does not have the information, it forwards the query to another DNS server until the correct IP address is found.

Registering a Domain Name

To use a domain name, it must be registered with a domain name registrar. A domain name registrar is a company that manages the reservation of domain names. They are accredited by the Internet Corporation for Assigned Names and Numbers (ICANN), which is the organization responsible for managing the DNS system.

To register a domain name, a person or organization must choose a domain name registrar and submit an application. The application includes the desired domain name, the owner’s contact information, and payment for the registration fee. Once the application is approved, the domain name is added to the DNS system and can be used to access a website or receive email.