The World Wide Web is based on unique numbers identified as IP addresses and each unit or site that is part of the Web features this type of an address. It really is very hard to remember to go to 188.8.131.52 to load a website though, so a significantly simpler system was made in the 80s - domains. Every single domain name is made of a main part plus an extension, for example domain.com or domain.co.uk. A number of extensions exist worldwide - some of them are given to countries, like .co.uk in the abovementioned example, which is given to the United Kingdom, while others are generic, for instance .com or .net. A number of extensions are available for registration by any kind of entity and others have precise requirements - company registration, regional presence, etc. You can get a new domain name from a registrar organization such as ours and if the extension supports domain transfers, you will be able to transfer an existing domain name between registrars too.