The World Wide Web uses unique numbers identified as IP addresses and each unit or website that is a part of the Web features such an address. It would be very difficult to remember to go to 18.104.22.168 to open a website though, that's why a significantly quicker system was made in the eighties - domains. Each domain name includes a primary part as well as an extension, for example domain.com or domain.co.uk. Plenty of extensions exist worldwide - some of them are given to countries, such as .co.uk in the aforementioned example, which is assigned to the United Kingdom, while others are generic, like .com or .net. Many extensions are available for registration by any entity and others have certain requirements - business registration, local presence, etcetera. You can acquire a brand new domain via a registrar company such as ours and when the extension supports domain transfers, you'll be able to transfer an existing domain between registrars too.