In brief
A domain is the unique, readable address of a website on the internet, for example kodlogy.at. It consists of a freely chosen name and an extension such as .at, .com or .eu. The Domain Name System (DNS) automatically translates this address into the IP address of the server on which the website is hosted.
What is a domain – and why does the term come up immediately in every website project? When you type an address like www.kodlogy.at into your browser, you are using a domain. It is something like your company’s street address on the internet: without it, visitors would need to know a long sequence of numbers to reach your website. In this article, we explain simply and without jargon how a domain is structured, how it works technically, which domain types exist and what you should look out for when choosing one.
What is a domain? The simple explanation
Every server on the internet can be reached via an IP address, i.e. a sequence of numbers such as 192.0.2.10 (IPv4) or an even longer IPv6 address. Technically, you could call up a website directly via this number. In everyday life, however, that would be impractical: nobody remembers a separate combination of numbers for every website they visit.
This is exactly where the domain comes in. It is an easy-to-remember name that points to this IP address. You know the principle from the contacts on your mobile phone: instead of the number, you tap a name, and the phone dials the right number for you. On the internet, the Domain Name System, or DNS for short, takes on this task.
It is important to distinguish between two related terms:
- Domain: the name, such as kodlogy.at.
- URL: the full address of a specific page including protocol and path, such as https://www.kodlogy.at/kontakt/.
- Web hosting: the storage space on a server where the files of your website are kept. The domain points to this hosting.
How is a domain structured?
Domains have a hierarchical structure and are read from right to left. Using the example www.kodlogy.at, it looks like this:
| Component | Example | Meaning |
|---|---|---|
| Top-level domain (TLD) | .at | The extension on the far right, also called the domain ending |
| Second-level domain | kodlogy | The freely chosen name, usually the company or brand name |
| Subdomain | www | Optional part in front, e.g. www, shop or blog |
The top-level domain, or TLD for short, sits at the top of this hierarchy. It is often also called the domain extension or domain ending. You may choose the name in front of it freely within the rules of the respective extension, as long as it is not already taken and does not infringe the trademark or name rights of third parties.
How does a domain work technically?
As soon as you enter an address in the browser, a lookup starts in the background that usually takes only milliseconds:
- Your device asks a DNS resolver, usually that of your internet provider, for the IP address of the domain.
- If the resolver does not know the answer from its cache, it works its way through the root servers and the servers of the respective extension to the responsible name servers of the domain.
- The name servers return the stored records, such as the A record with the IP address of the web server.
- The browser connects to this server and loads the website.
If no matching record is found on any of the responsible servers, the website cannot be opened – the browser then reports an error. That is why a clean DNS configuration is so important. Besides the A record, there are other records, such as MX records for email, CNAME records for pointing to other names or TXT records for security features such as SPF and DKIM.
Domain types: which domain extensions are there?
Today, hundreds of extensions are available. They are assigned by so-called registries, and the overall system is coordinated by ICANN. Roughly speaking, domain types can be divided into four groups:
Country-code domains (ccTLD)
Every country has its own two-letter extension: .at for Austria, .de for Germany, .fr for France, .es for Spain or .us for the USA. For the European Union, there is also .eu. The .at domain is managed by nic.at and is particularly popular with businesses whose customers are in Austria, because it immediately shows a regional connection.
Some country extensions are used for other purposes because of their meaning: .tv actually belongs to the island state of Tuvalu and is popular for video and media projects, while .me is the extension of Montenegro and is often used for personal websites.
Generic domains (gTLD)
The classic generic extensions are not tied to a country:
- .com – from “commercial”, originally intended for companies and the best-known extension worldwide.
- .net – from “network”, originally for network and internet providers.
- .org – from “organization”, frequently used by associations, foundations and non-profit organisations.
- .info – from “information”, for information services of all kinds.
- .biz – from “business”, introduced as an alternative to .com for companies.
- .pro and .name – for freelancers and personal websites respectively.
As a rule, no proof is required when registering these extensions. The principle is “first come, first served”.
New extensions (new gTLD)
For some years now, there have been numerous thematic extensions such as .shop, .online, .agency or .app, as well as city extensions such as .wien. They can be interesting for campaigns or brands, but in everyday life they are less familiar than .at or .com.
Restricted extensions
Some extensions may only be used by certain institutions. .edu is reserved for accredited educational institutions in the USA, .gov for US government authorities. For businesses in Austria, they play practically no role.
Which domain extension suits which project?
There is a lot of debate about the right extension. There is no universal rule, but a few practical rules of thumb help with the decision:
| Your situation | Recommendation |
|---|---|
| Customers mainly in Austria | .at as the main domain |
| Customers in the DACH region or the EU | .at or .eu, also secure .de and .com |
| International brand | .com as the main domain, country extensions as redirects |
| Association or non-profit organisation | .at or .org |
| Campaign or product page | a suitable new extension, e.g. .shop or .wien |
Our advice from practice: secure the most important variants of your name and redirect the secondary domains to one main domain via a 301 redirect. This protects your brand without creating duplicate content.
Domain, hosting and email from a single source
We register your desired domain, set up DNS, SSL and email and take care of renewals.
Why do I need a domain?
Many business owners ask themselves: why do I need a domain if I already have a social media profile or an entry in a business directory? The answer is mainly about control and trust:
- Your own address: a domain belongs to you. Platform profiles can change, be restricted or be blocked.
- Professional email: office@yourcompany.at looks more trustworthy than a free email address and builds trust with enquiries.
- Brand awareness: a short, catchy domain sticks in the mind and looks good on business cards, vehicles and invoices.
- Visibility: only with your own domain and website can you become visible in a targeted way on Google, in AI search systems and on Google Maps.
No matter how much effort you put into your website: a domain that does not suit your business or is hard to spell holds you back from the very beginning.
How do you recognise a good domain?
- Short and easy to remember
- Easy to spell, even over the phone
- Ideally without hyphens, numbers and umlauts (or also secure the umlaut variant)
- Matching the company or brand name
- Free of third-party trademark and name rights
Domains and SEO: what really counts
There are many myths surrounding domains and search engine optimisation. The most important points at a glance:
Do domain extensions affect SEO?
An extension like .com, .net or .biz brings no direct ranking advantage. For highly competitive search terms, you will see websites with very different extensions on the first page. Country extensions still have a function, though: according to Google, the search engine uses them as a signal for which country a website is intended. An .at domain is therefore a good fit if you are targeting customers in Austria.
Does the registration period affect SEO?
It used to be said that a multi-year registration would bring better rankings. Google has contradicted this myth several times: the registration period is not a ranking factor. What matters more is that the domain is renewed permanently and the website remains reliably accessible.
What matters when changing domains
If you change the domain of an existing website, all old URLs must point to the new addresses via 301 redirects. Otherwise, rankings and backlinks are lost. Google describes this process in its guide to moving a website. In a relaunch, we always plan these redirects when we create a website in Vienna for you.
What is a subdomain?
A subdomain, also called a secondary domain or sub-domain, is an addition in front of the actual domain name. If yourcompany.at is the main domain, shop.yourcompany.at or blog.yourcompany.at are subdomains. You do not need a new registration for this; you simply create the subdomain in the DNS management or in the hosting panel.
Subdomains are suitable for clearly separate applications such as a customer area, a booking system or a test environment. For a blog or shop, on the other hand, a subdirectory such as yourcompany.at/blog/ often makes more sense, because the content there is more closely connected to the main website.
Finding, registering and managing a domain
How do I search for a domain?
You can see in a few seconds whether your desired domain is available using the domain lookup of a registrar or the responsible registry. Enter the name and check several extensions at the same time. If the domain is taken, it is worth checking whether it is actively used.
What is Whois information?
The term comes from the English “Who is?”. A Whois lookup shows data about a domain, such as when it was registered, when the term ends, which registrar is responsible and which name servers are stored. Since the GDPR (DSGVO), personal data of owners is no longer publicly visible for many extensions.
What is a domain backorder?
A backorder is a kind of reservation. A provider monitors a registered domain and tries to register it for you immediately when it becomes available. This is particularly interesting for domains that are registered but not used. Whether it works depends on whether the owner renews the domain.
How do I buy a domain?
Strictly speaking, you do not buy a domain but register it for a certain period, usually one year with automatic renewal. For this, you need a registrar or hosting provider. After registration, you connect the domain to your web hosting and set up email mailboxes. Make sure that your company is entered as the owner and not an agency or an employee.
What is ICANN?
The Internet Corporation for Assigned Names and Numbers, or ICANN for short, was founded in 1998. The non-profit organisation coordinates the allocation of domain names and IP address ranges worldwide and ensures that the system remains stable and unambiguous. The individual extensions are managed by registries such as nic.at for .at or EURid for .eu.
How Kodlogy supports you with your domain
A domain is only the first step. To turn it into a website that brings in enquiries, you need fast hosting, a clean design and good content. Kodlogy Technologies GmbH in Vienna supports you from the very beginning – in English or German:
- Advice on choosing the name and extension, including variants for brand protection
- Registration, DNS setup, SSL certificate and email – also as managed hosting in Vienna
- Professional web design in Vienna for your new address
- Clean redirects when changing domains or relaunching, so that rankings are preserved
You have a domain but no website yet?
We build your website at a fixed price – one-page websites are available from €599.
Frequently asked questions about domains
What is a domain in simple terms?
A domain is the readable address of a website, for example kodlogy.at. It replaces the hard-to-remember IP address of the server. In the background, the Domain Name System (DNS) translates the name into this sequence of numbers so that the browser loads the right website.
Why do I need a domain?
Without your own domain, your website can only be reached via an IP address or someone else’s platform address. Your own domain makes your business easy to find, looks professional and allows email addresses such as office@yourcompany.at. It also belongs to you and not to a platform.
What domain types are there?
The main distinction is between country-code top-level domains such as .at, .de, .fr, .es or .us, generic extensions such as .com, .net, .org, .info or .biz, and newer extensions such as .shop, .online or the city extension .wien. In addition, there are restricted extensions such as .edu or .gov.
Which domain extension is best for a business in Austria?
For businesses that sell mainly in Austria, .at is usually the first choice, because it signals a regional connection and is familiar to customers. If you operate internationally, also secure .com or .eu. Above all, the address should be short and unambiguous.
Do domain extensions affect Google rankings?
An extension like .com or .info gives no direct ranking advantage. Country extensions like .at, however, show Google that the website is aimed at users in Austria. What matters for good rankings is content, technology and user experience – our SEO agency in Vienna helps you with exactly that.
Does the length of the domain registration affect SEO?
According to Google, the registration period is not a ranking factor. Whether you register a domain for one year or several years is irrelevant to the search engine. What matters is that you do not miss the renewal, so the domain does not become available again.
What is a subdomain?
A subdomain is a part placed in front of an existing domain, such as shop.yourcompany.at or blog.yourcompany.at. It is created in the DNS management and can point to its own area or server. Search engines often treat a subdomain like a separate website.
How do I find out whether my desired domain is available?
Enter the desired name at a domain provider or in the domain lookup of the responsible registry, for .at for example at nic.at. If the name is taken, the lookup will show it. Check similar spellings and the most important extensions at the same time.
What is Whois information?
Whois is a directory with data about a domain, for example the registration date, the responsible registrar and the name servers. Since the GDPR (DSGVO), personal data of owners is no longer shown publicly for many extensions. For businesses, it remains important that the stored contact details are up to date.
What is a domain backorder?
With a backorder, you instruct a provider to monitor a domain that is already registered and to register it for you immediately if it becomes available. There is no guarantee of success, because the current owner can renew the domain at any time.
How do I buy a domain?
Domains are registered with a registrar or hosting provider and renewed every year. You choose the name, check availability, enter your owner details and then connect the domain to hosting and email. On request, Kodlogy handles all of this as a package with hosting in Vienna.
What is ICANN?
ICANN stands for Internet Corporation for Assigned Names and Numbers. The non-profit organisation was founded in 1998 and coordinates the system of domain names and IP addresses worldwide. The individual extensions are managed by registries; in Austria, nic.at is responsible for .at.
