June 21, 2024


General will live on forever

What Is an Apex Domain, And How Does It Work?

Learn Domain Layer Principles Unit | Salesforce Trailhead

In the world of Domain and Hosting, when you search domain names, you come across various types of domain terms which often confuse people, and one of them is “Apex Domain”. 

It may sound technical, but it is the fundamental concept which helps the users find the content they are looking for, making it essential for you to understand what it is exactly and how it works. 

Keep reading this article to better understand the “Apex Domain.”

What Is an Apex Domain?

An Apex Domain, often called a root or bare domain, is the fundamental web address devoid of additional subdomains. Apex Domains are pivotal as they signify the foundation of a website’s domain hierarchy. It serves as a website’s primary and easily recognisable name. 

For instance, “example.com” exemplifies an Apex Domain, while “www.example.com” does not. 

You can visualise the Apex Domain as the principal entrance to a building; it is straightforward to locate and access. In the context of a website, “example.com” represents the main entrance, while “blog.example.com” would be akin to a side door.

Overview: Terms Related To Domain Apex And Their Examples 

Apex Domain NameThe highest level in the DNS hierarchy represents a domain without any subdomains.“example.com”
Top-Level DomainA dot separates the part of the domain name that follows the Apex Domain.“.com,” “.net”
URLUniform Resource Locator is the web address used to access specific resources on the internet.https://www.example.com
SubdomainA division of the main domain is used to organise and access different sections of a website.“blog.example.com,” “store.example.com”

How Does an Apex Domain Work? 

  1. Domain Hierarchy: The Apex Domain is like the CEO of web addresses, sitting at the top of the Domain Name System (DNS) hierarchy.
  2. URL Structure: In a web address (URL), it’s that part just before the dot (.) and the familiar “.com” or “.org.” For example, “example” is the Apex Domain in “https://www.example.com.”
  3. User’s Request: When you type a URL or click on a link, DNS resolves it into an IP address, starting with the Apex Domain.
  4. DNS Configuration: Website owners are like directors. They set up the rules for the Apex Domain by configuring DNS settings, like pointing it to a specific web server. This configuration tells the DNS system where to find the website’s content.
  5. Routing Traffic: DNS directs the requests for the Apex Domain to the right web server. The server then delivers the website’s content to the user.
  6. Web Hosting: Apex Domains are commonly associated with web hosting servers where a website’s content is stored.
  7. Security: The Apex Domain often uses SSL/TLS certificates to protect your data. These are like security guards for your online information.
  8. Subdomains: The Apex Domain can have its own family of web addresses, known as subdomains. Each subdomain is like a department within a company with its settings.
  9. Easy Access: It simplifies web addresses, making accessing a website’s main content easy for users.


The Apex Domain is the highest-level domain in the domain name hierarchy and is often used to represent the main website of a domain. 

However, understanding the concept of the Apex Domain and how it works will help you ensure that users can access their websites easily on the internet.