The World Wide Web uses unique numbers referred to as IP addresses and each unit or site that is part of the Web has such an address. It would be very hard to remember to visit 18.104.22.168 to open a website though, that's why a significantly quicker structure was introduced in the eighties - domain names. Every domain consists of a main part plus an extension, for instance domain.com or domain.co.uk. A wide range of extensions exist globally - some of them are given to countries, just like .co.uk in the aforementioned example, which is given to the United Kingdom, while many others are generic, such as .com or .net. Some extensions are available for registration by every entity and others have specific requirements - company registration, local presence, etc. You'll be able to acquire a new domain via a registrar firm like ours and if the extension allows domain transfers, you can move an existing domain between registrars as well.