The World Wide Web uses unique numbers called IP addresses and every unit or web site that is part of the Web has such an address. It is pretty difficult to remember to visit 188.8.131.52 to see a website though, so a significantly simpler structure was launched in the eighties - domain names. Each domain includes a primary part and an extension, for example domain.com or domain.co.uk. Various extensions exist worldwide - part of them are assigned to countries, for example .co.uk in the abovementioned example, which is given to the United Kingdom, while various others are generic, for example .com or .net. A number of extensions are available for registration by any entity and others have certain requirements - business registration, local presence, etc. You can acquire a new domain from a registrar company like ours and if the extension supports domain name transfers, you can transfer an existing domain between registrars as well.