Nomenclature de domaine

Understanding the Difference Between a Domain, Subdomain, and Alias

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Search for a domain name

A domain is the main address of your website. Essentially, it’s what people type into their browser to find you, like “yourwebsite.com.” It’s like giving someone your postal address, but instead of receiving mail, you get visitors to your site. It’s your digital identity, the name under which you’re known on the web. No domain, no website. And no, it’s not negotiable.

To get a domain, you have to go through a registrar, like Astral Internet (but don’t worry, it’s easy). You choose a name, and if someone else hasn’t taken it, you become the official owner of that web address. But beware, just like a gym membership, you have to remember to renew it every year. Yes, being a web pro involves a bit of paperwork!

Subdomain: The Special Little Corner of the Domain

Using a subdomain

A subdomain is like a small extension of your main domain. You use it to create dedicated sections of your site. For example, let’s say you already own “yourwebsite.com.” If you also have a blog about baking (because who doesn’t love cakes?), you could create a subdomain: “blog.yourwebsite.com.” There you go, it’s still your site, but now with a dedicated space for sugar and flour!

Subdomains are very useful for organizing your content and creating specific sections without needing to purchase another domain. And the bonus? They’re free as long as you own the main domain! You can create as many as needed depending on your site’s needs. A handy tool for businesses or expanding projects.

Did you know that adding “www” before a domain is actually the most common subdomain? In fact, it’s a subdomain typically used to show the same content as the main domain.

Alias: Another Name for the Same Website

An alias is like the master of disguise on the web. Essentially, it’s another domain name that redirects to your main website. For example, let’s say you own “yourwebsite.com,” but you also have “yourothersite.com.” Rather than managing two separate sites, you can make “yourothersite.com” redirect straight to “yourwebsite.com.” No matter which name people use, they’ll end up in the same place.

subdomain "www"

It’s super useful if you want to ensure no one gets lost trying to find your site. You can secure all possible versions of your domain: “.com,” “.net,” “.org,” or even “.pizza” (yes, it exists). An alias is also perfect for catching typos. If someone types a domain name similar to yours, you can redirect them to your main site. Think of an alias as the GPS of the web—it helps guide your visitors back on track.

Not only is an alias useful for redirecting to the same site under different domain names, but it can also be used for multisite setups or multilingual websites. A good example is when you manage different versions of your site for various regions or languages. You can use aliases to create specific addresses like “yourwebsite.fr” for a French version or “yourwebsite.es” for a Spanish version. Each alias can redirect to the right content while giving the impression of a localized, user-friendly address. And of course, aliases can also be used to redirect between different sites you manage, like Project A or B.

Differentiating Between a Domain, Subdomain, and Alias

Let’s summarize to make it crystal clear:

  • Domain: The main address of your website, the one that allows people to find you on the web.
  • Subdomain: An extra space under your domain, used to organize content (e.g., “blog.yourwebsite.com”).
  • Alias: Another domain name that redirects to your main domain (e.g., “yourothersite.com” pointing to “yourwebsite.com”).
Composition of a domain name

A Few Tips for Using Them Wisely

Now that you know the difference between a domain, subdomain, and alias, here are a few tips to get the most out of each:

  • Choose a domain that’s simple and easy to remember: It should be memorable and free from tricky spelling. If your visitors make a typo, an alias will save the day!
  • Use subdomains to organize your content: Blog, store, forum—each can have its own subdomain. This helps visitors navigate easily and gives your site a professional look.
  • Register aliases if needed: If you have multiple versions of your domain or want to secure other extensions, an alias is the perfect solution. Plus, it prevents someone else from grabbing a name too similar to yours.
Completed Domains Blog

Now that everything’s clear, you’re ready to navigate the world of domains like a pro. Whether you’re launching a blog, an online store, or just adding some aliases to look cool, you now have the basics to manage it all like a pro. And if you’re still a bit lost, our team is here to help!


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