What is a domain name? The simple guide 2026
- A domain name is a site's alphabetic address (for example `my-site.com`): it replaces an IP address, a string of numbers unreadable for humans.
- The DNS (Domain Name System) translates this name into an IP address in a few milliseconds, via a chain of servers, so the browser can find the right server.
- A name is made up of a chosen name and an extension (TLD): `.com`, `.fr`, `.net`, `.eu`... depending on the target and type of site.
- You don't buy it outright: you rent it from a registrar, usually on a yearly basis.
What exactly is a domain name? It is the address you type to reach a site, like my-site.com. Behind this simple word lies an elegant mechanism that makes the internet readable for humans. Here is the essential, without jargon.
A readable address, not numbers
Every server connected to the internet has an IP address: a string of numbers such as 192.0.2.10. Handy for machines, unpronounceable for us. The domain name is a text identifier associated with that IP address: instead of remembering numbers, you type a name.
It is therefore a convenient intermediary: it gives a site a memorable address, without the visitor ever having to know the IP address hiding behind it.
How the DNS works
When you enter a domain name, your browser doesn’t yet know where to go. It queries the DNS (Domain Name System), the internet’s great directory. The DNS translates the name into an IP address via a chain of hierarchical servers, and does so in a few milliseconds.
At the end of that chain, “authoritative” name servers return the final IP address. The browser can then contact the right server and display the page. All of this happens in the blink of an eye, on every visit.
The structure of a domain name
A domain name reads as two parts separated by a dot:
- The chosen name: made up of letters, numbers and the hyphen (
-), this is the part you select. - The extension, or TLD (Top-Level Domain):
.com,.fr,.net,.eu,.paris…
Extensions fall into families: generic (.com, .net), geographic (.fr, .eu) and thematic (.immo, .paris). The choice sends a signal: a .fr anchors locally, a .com sounds international.
Domain name and hosting: two distinct things
Registering a domain name does not create a site. The domain is the address; the hosting is where the site’s files are stored. The domain “points” to the hosting, a bit like a shop sign directs you to premises.
That is why the two go hand in hand when launching a site. To choose where to house yours, see our selection of the best web hosting, and if you are going with WordPress, our comparison of the best WordPress hosting.
Rent it, and remember to renew
You don’t buy a domain name outright: you rent it from a registrar, most often by the year, for around ten euros. As long as you renew, it stays yours. If you let the registration expire, the name becomes available again for others: hence the importance of keeping an eye on the renewal date.
In summary
A domain name is a site’s readable address, translated behind the scenes by the DNS into an IP address. It is made up of a name and an extension, is rented by the year and points to separate hosting. Understanding it means grasping the very first building block of any website.
Frequently asked questions
Is a domain name the same thing as a website?
No. The domain name is only the address: it points to hosting where the site's files actually live. You can register a domain without yet having a site, and a single hosting account can house several domains.
Do you buy a domain name forever?
No, you rent it. The registration is for a set period (often a year), renewable. If you don't renew, the name becomes available again for others. So you need to remember to renew it in order not to lose it.
Which extension should you choose: .fr or .com?
The .fr strengthens local roots for a French audience. The .com is perceived as international and remains the most recognised. The choice depends on your target; some register both to protect their brand.