What is a domain?

Domain: definition and structure

A domain is the address at which a website, an online store or an email mailbox can be reached on the internet. People remember names more easily than strings of numbers, so the domain stands in for the IP address of the server where the content is stored. Without its own domain, a company depends on borrowed addresses from website builders or marketplaces.

A domain is read from right to left. In shop.example-company.com, “.com” is the top-level domain (TLD), “example-company” is the freely chosen name, and “shop” is a subdomain the owner can create at will. A domain is not the same as a URL: the URL adds the protocol and path, such as https://example-company.com/contact.

How registration works

Domains are not bought but rented, usually for one year with automatic renewal. You engage a registrar, typically a hosting provider, which enters the domain with the responsible registry. For .de domains, that is DENIC eG in Frankfurt am Main. For common extensions, costs are usually in the single-digit to low double-digit euro range per year.

The domain holder is the legally responsible party. The holder concludes the contract, is accountable for the data provided and can move the domain to another provider—for .de domains with an auth code from the previous provider. Where the domain technically points is controlled by the DNS settings.

Real-world example: who owns the company’s domain?

An electrical contractor had its website built by an agency years ago, and the agency registered the domain in its own name. When the contractor wanted to switch providers, the domain could not simply be released—and all employees’ email addresses depended on it.

The case is common. That is why the rule is: the holder of the domain should always be the company itself, with a contact email that is permanently reachable. If you change your website or service provider, the address then stays under your control, and the associated email addresses are not at risk either.

Common mistakes and what to watch for

A good domain is short, easy to spell and, ideally, free of strings of hyphens. Before registering, check whether trademark or name rights of third parties could be affected, and secure obvious spelling variants, typo domains or additional extensions if needed, so customers still find you after a small typing error.

Where domain, hosting and website work together, Nano Concepts can handle the technical setup if you wish: from registering the domain in your name to DNS, email and redirects during a relaunch. That way, your company’s address stays permanently in your hands.

• The holder is the company, not an agency or individual employees
• Note the expiry date and enable automatic renewal
• Keep the holder’s contact details and email address up to date
• Secure registrar access with a strong password and two-factor protection
• When changing domains, set up 301 redirects from the old to the new address