The World Wide Web uses unique numbers referred to as IP addresses and every single unit or site that is a part of the Web has this type of an address. It would be very hard to remember to go to 184.108.40.206 to open a website though, that's why a much quicker structure was introduced in the 80s - domain names. Each domain is made of a primary part and an extension, to give an example domain.com or domain.co.uk. Plenty of extensions exist worldwide - some of them are assigned to countries, such as .co.uk in the aforementioned example, which is given to the United Kingdom, while others are generic, for example .com or .net. Various extensions are available for registration by any kind of entity and others have precise requirements - business registration, regional presence, etc. You are able to obtain a brand new domain from a registrar organization such as ours and if the extension supports transfers, you can transfer an existing domain between registrars too.