Top level domains

A top-level domain (TLD) is the extension of each domain and represents the first level of an Internet address. In general, a distinction is made between country-related top-level domains (ccTLDs for country code) such as .pk, .uk or .us. and generic top-level domains (gTLDs) such as .com, .net, org or .info.

Country-specific top-level domains (ccTLD)

The responsibility for a country-specific top-level domain lies in the respective country, which is why the conditions for registering a domain below a top-level domain can vary from country to country. The main differences are in the minimal length of a domain, but also in the use of special characters or numbers.

Not all country-related top-level domains can be registered freely. Some top-level domains are reserved only for the residents of the respective country.

However, there are also restrictions with other geographical domains, such as the top-level domain. berlin. registration is reserved only for people or companies based in Berlin.

Generic top-level domains (gTLD)

In contrast to the geographical top-level domains, the generic top-level domains are not geographically limited but differ in the type of content offered by a gTLD domain. Examples include .biz for commercial offers from companies, .org for organizations and .gov for Internet offers from the US government.

Do you have questions about domains?

What is ICANN?

An American non-profit organization that manages the top-level domains. It is the coordination point for the technical allocation of top-level domains.

What does TLD mean?

That stands for top-level domain, the highest level of an internet address or domain.

What is the difference between ccTLD and gTLD?

Some are country-code TLDs, i-e country domains such as .pk for Pakistan, the others are generic TLDs, which means that they denote categories or certain groups such as .asia in Asia or .com for (mostly) commercial offers.

Who can register which top-level domains?

To register a domain, you usually contact a registrar (such as OnlineNIC). Different terms and conditions for domain registration apply to the respective TLDs because some domain names (restricted domains) cannot be freely registered by anyone. Any prerequisite may be the residence in the relevant country, proof of business, etc.

How is a domain structured?
You can roughly compare a domain name with a telephone number: for worldwide communication you need the country code, then the city code and finally the number of the subscriber, e.g. 92/423 / 123456-78. A domain is structured very similarly, only in the other direction:

Do you have to “www.” enter with? Since the “www” is technically only a subdomain = subdomain, theoretically quite different websites can appear under domains like “” and ””. Practically, it is in most cases that the same page appears, regardless of whether with or without “www.”

What is the URL?
A URL is an address on the Internet. In addition to the domain, this can also include a path and a file name. The URL of the DMT web hosting internet services blog, for example, is “”

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