What is a domain IP address

Internet What is a domain?


Anyone who uses the Internet comes into contact with domains when they visit websites at the latest. But what are domains actually? What is DNS and TLD all about? And what are domains made of? We explain all of this to you in this article.

What is a domain?

A domain is a unique name that is assigned to a website. The domain of this website is for example heise.de.

The domain is part of the Uniform Resource Locators (URL) a website. A URL is what is colloquially often referred to as "Internet address" or "Link": In addition to the domain as a rough address, it also contains the exact path on the individual website, for example: www.heise.de/tipps-tricks/

Computers actually reach websites via their IP addresses. These are long strings of numbers and characters that are difficult to remember as an Internet user. This is made much easier by URLs: Your computer first sends an entered URL to a so-called name server, which is then selected from the appropriate Domain Name System (DNS) looks for the IP address belonging to the domain. You can think of DNS as a directory of all existing websites, which stores where you should be forwarded to. You can read more about what a URL is here.

What is a domain made of?

A domain usually consists of three levels, each of which refers to a specific part of the Internet when a URL is translated into an IP address.

Please note that domains are evaluated from right to left.


Top-level domain

Top-level domains (TLDs) are also often referred to as domain extensions. These include, for example .com, the country-specific .de and .at or new endings like.Shop. Basically, the TLDs should describe the content of the websites - .com is therefore intended for companies, for example.

For each TLD there is a Domain Name System guided. The name servers already described exist so that you are forwarded to the correct DNS when a request is made. These make sure that you when you get a .com-Address want to visit, also be forwarded to the DNS that is to .com belongs.


Second level domain

The second-level domain is a subdomaine with a freely selectable but unique name that is subordinate to the TLD. Such a second-level domain is always related to the top-level domain and is usually assigned by commercial providers.

Third level domain


Third-level domains are also subdomains, but they are also subordinate to the second-level domain. These can be used to delimit individual areas of your own website from one another: Third-level domains that occur frequently are, for example www. for websites, m. for websites on mobile devices or shortcuts like de. or en. for the respective languages.

In addition, further subdomains can be added, but this is less common.

So do you want the website www.example.com call, you will first be sent from a name server to the DNS for .com-Addresses directed. There it becomes example.com associated IP address to which you will then be forwarded. The subaddress www. indicates in this context that this is a website.