What's a Subdomain & How Is It Used? (2024)

When you visit a website, you may notice the URL in the search bar changes slightly based on your location on the site or which web page you’re viewing.

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For example, you can visit hubspot.com to view and access the tools and services offered. Or, you can visit blog.hubspot.com to access the section of our website that serves blog content. Although the URL changes slightly, you’re still on HubSpot’s website, under HubSpot’s domain.

In this article, we’ll look at the part of the URL that does change — called the subdomain — and why exactly that is.

What is a subdomain name?

A subdomain name is a piece of additional information added to the beginning of a website’s domain name. It allows websites to separate and organize content for a specific function — such as a blog or an online store — from the rest of your website.

A domain name typically has two parts: The top-level domain (TLD) is the extension, such as .com or .org, and the second-level domain (SLD) is the unique part of the domain name, often a business or brand name. In the hubspot.com example, com is the TLD and hubspot is the SLD.

The subdomain is what goes before the SLD. The most common subdomain is www, which stands for World Wide Web. This subdomain contains a website’s homepage and its most important pages. The www subdomain is so widely used that most domain registrars include it with domain name purchases.

Subdomains are also commonly used to separate a section of a website from the main site. For example, blog.hubspot.com and shop.hubspot.com direct to our blog and online store respectively.

When we group our domain name and subdomain with a protocol at the beginning (HTTP or HTTPS for websites) and an optional file path at the end, we have a complete URL:

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What is a subdomain used for?

Subdomains make it simple for you to organize the various functions of your website, while also making it easier for users to find these different functions.

Think about it this way: If you’re hosting a party, you need to provide guests with your address. The TLD would be the city you live in while the SLD would be your number and street name. If you live in an apartment building, you need to get even more specific so your guests know which apartment to ring. Your apartment number would be akin to a subdomain — a specific section of the greater building that's dedicated to your living space.

If you plan to add more functions to your website, such as a store, a forum, or a blog, you might add a subdomain to your domain to separate these functions off from your main website.

You can also use subdomains to create localized content. For example, if you run a restaurant chain with multiple locations, customers can visit www.myrestaurant.com for all-encompassing content. Or, customers looking for the menu at your Nashville, Tennessee location can access this information via nashville.myrestaurant.com.

Subdomain Examples

If you’re looking to create a subdomain on your website but aren’t sure what that would look like, refer to the www.hubspot.com and blog.hubspot.com example mentioned above.

By separating the HubSpot Blog from the rest of the website, it makes it obvious to visitors where they’re located on the HubSpot website as a whole. This is helpful considering www.hubspot.com focuses on the HubSpot product line, while blog.hubspot.com contains articles that don’t necessarily relate to HubSpot products. Separating the two from each other with a subdomain keeps everything organized and helps visitors find what they need.

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Here’s another example: In addition to its online store that sells new products, outdoor clothing brand Patagonia also resells its used clothing through the Worn Wear program. When we visit both of these links, we see that www.patagonia.com encompasses the Patagonia store (as well as other initiatives by the brand) and that wornwear.patagonia.com is used for the Worn Wear section.

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Websites can use subdomains in other ways too, like to denote language or region. Wikipedia does this with its articles. For instance, the en subdomain means the article is written in English, es indicates Spanish, and so on.

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Here’s a fun subdomain trick: Try replacing the subdomain for a Wikipedia article with simple. You may see a simplified English version of the article for those learning the language and those with different needs.

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Now let’s take a look at how you can go about creating a subdomain on your own website.

How to Create a Subdomain

  1. Name your subdomain.
  2. Log into your cPanel.
  3. Navigate to and enter your subdomain.
  4. Create a new DNS record.
  5. Click Create and wait for your subdomain to resolve.

No matter what you want to use your subdomain for, you can create one with the help of your web hosting provider.

For example, HubSpot's CMS tools make it easy to host your content on one subdomain per content tool you use (e.g. blog, landing page, website page) forone brand domain.

It’s important to note that these features are specific to HubSpot’s CMS. Your hosting provider as well as the service through which you obtained your domain name are unique.

On that same token, as we work through the following steps, keep in mind that they may differ slightly depending on your service.

1. Name your subdomain.

First, think of a subdomain name that best fits the section of the site you’re assigning. Common subdomains include blog, store, shop, support, help, and events.

There’s no need to overthink this — pick a name that succinctly describes this part of your site, and limit it to one word if you can. That way, your URL will look clean and familiar to visitors, even with the extra name tacked on.

2. Log into your cPanel.

To begin creating your subdomain, log into your hosting provider’s file manager, which is likely to be cPanel. Every hosting provider has a unique login and setup for their cPanel, but your screen should look something like this.

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3. Navigate to and enter your subdomain.

Now you’ll want to navigate to Subdomains or Add Subdomains. Here you can begin to enter your subdomain of choice. Add the subdomain, and be sure your primary domain name is selected as well.

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4. Create a new DNS record.

Once the domain is created, you’ll need to add a new domain name system (DNS) record. Navigate to DNS and select Add (or a similar command). Select what you want your subdomain to connect to, whether it’s an IP address, an IP address connected to the destination hostname, a server name, or a wildcard domain.

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5. Click Create and wait for your subdomain to resolve.

Finally, click Create, or a similar commend, and wait for your subdomain to resolve. It typically takes anywhere from 30 minutes to 24 hours for your subdomain to be implemented and functional on your website.

Add a subdomain to your site

If you’re unsure as to whether you should publish a particular page under your www subdomain or under a different subdomain, think about the primary goals of your website. Pages related to this goal should fall under www, and consider placing other pages under a custom subdomain if there are enough to make up a substantial part of your site. A collection of a few pages probably doesn’t need its own subdomain.

For example, if you run an online store and write the occasional blog post, you can use www.mywebsite.com for your store and blog.mywebsite.com for your blog section. Conversely, if you mainly publish a blog and sell some merch on the site, use www.mywebsite.com for your blog and store.mywebsite.com for the ecommerce side.

By implementing subdomains on your website, you can create separate sections of content and services for your website without having to create new domain names for each part. Subdomains will also make it easier for users to find what they need, all in one place. If it improves your visitors’ experience, it’s likely a step worth taking.

Topics: Web Hosting

What's a Subdomain & How Is It Used? (2024)


What's a Subdomain & How Is It Used? ›

A subdomain allows websites to organize their content into separate sections dedicated to a specific function or type of content. For example a website may house its blog, shop, or client portal on unique subdomains (blog.example.com, shop.example.com, etc.).

What is a subdomain used for? ›

A subdomain is a prefix added to a domain name to separate a section of your website. Site owners primarily use subdomains to manage extensive sections that require their own content hierarchy, such as online stores, blogs, job boards or support platforms. Subdomains function as a separate website from its domain.

What is a subdomain and example of one? ›

Subdomains are also commonly used to separate a section of a website from the main site. For example, blog.hubspot.com and shop.hubspot.com direct to our blog and online store respectively.

Why are subdomains useful? ›

Subdomains can provide organization and structure to your site if you have a lot of different, but important content to share. Subdirectories can be helpful for smaller websites that don't have a large variety of content.

What is the best use of subdomains? ›

Typically, subdomains are used if there is content that is distinct from the rest of the site. For example, blog.examplesite.com and shop.examplesite.com are subdomains of www.examplesite.com.

Why do owners use subdomains? ›

To test a new website

This is the most common reason why users create subdomains. Website developers might create subdomains as a testing or staging version of a website before it goes live.

What is the difference between a URL and a subdomain? ›

Subdomains are a unique URL that lives on your purchased domain as an extension in front of your regular domain like support.splashthat.com or blockparty.splashthat.com. Directories are a unique URL that lives on your purchased domain as an extension at the end of URL like splashthat.com/webinars.

When to use subdomains? ›

Subdomains are used to segregate and organize different sections of a website for better navigation and content management. Here are some examples: blog.websitename.com: Focuses on the blog, distinct from the main site.

What is the difference between a website and a subdomain? ›

While both are an important part of your web address, it's important to be aware of the distinction between domains vs subdomains. The domain is the principal part of your website address that represents your core brand and content. Meanwhile, subdomains act as subsections of your root domain.

What is a valid subdomain example? ›

An example of a subdomain is store.yourwebsite.com . Here, 'store' is the subdomain, 'yourwebsite' is the primary domain, and '.com' is the top level domain (TLD).

What is the most used subdomain? ›

The most common subdomain is “www” or “world wide web.” The subdirectory points users to the main directory of a website—in other words, where your homepage and other core pages live. Other subdomains work to create distinct parts of a site. For example, Google's root domain is www.google.com.

Do I need a subdomain? ›

Your subdomain will allow you to use more keywords focused on a different area of your industry without overwhelming your main site or competing with it for traffic.

Are subdomains still used? ›

This helps you to create a different look, feel, and functionality for your online store than your main website. You'll come across subdomains like these all over the internet. They're incredibly common. To see whether your site is using any subdomains, crawl your website with Semrush's Site Audit tool.

What are the limitations of subdomains? ›

A domain can have up to 500 subdomains. You can create multiple levels of subdomains such as store.product.yoursite.com, test.forum.yoursite.com, etc. Each subdomain can be up to 255 characters long, but for multi level subdomains, each level can only be 63 characters long.

Does Google like subdomains? ›

The short answer is yes, Google can and will index and rank subdomains unless you explicitly take steps to ensure they're excluded from its index. Google's entire business model is based on discovering content. The same goes for all search engines.

How do you handle subdomains? ›

Enter the name of a domain with a subdomain, choose Exclude root, and modify the subdomain to add a new level. For example, if you have a domain called alpha.example.com and you want to create a multilevel subdoman beta.alpha.example.com, you would enter beta as the subdomain value.

Should I use a subdomain or a new domain? ›

Subdomain companies risk not being as memorable as companies that have their own domain names because they're dependent on the parent company's TLD. That means a customer has to remember the names of both brands to immediately jump to your site, and your subsidiary doesn't have an independent online identity.

Do subdomains cost money? ›

Typically, subdomains are free through your web hosting provider. Domain registrars like GoDaddy and IONOS enable users to create subdomains at no additional cost. Some providers offer a free domain name in addition to free subdomains.

Do subdomains have to be registered? ›

It is not always necessary to register a new domain name if you already have one and you are interested to have a separate site apart from the main one. Rather than registering a new domain name, you can always create a subdomain using a domain you already own, for example blog.

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