The World Wide Web is based on unique numbers called IP addresses and every single unit or website that is a part of the Web has such an address. It really is pretty difficult to remember to visit 123.123.123.123 to load a website though, that's why a much easier structure was introduced in the 1980s - domain names. Each domain consists of a primary part and an extension, to give an example domain.com or domain.co.uk. Plenty of extensions exist worldwide - part of them are given to countries, like .co.uk in the aforementioned example, which is assigned to the United Kingdom, while various others are generic, such as .com or .net. Many extensions are available for registration by any kind of entity and some others have particular requirements - business registration, local presence, etc. You are able to get a brand new domain name through a registrar company like ours and when the extension allows domain transfers, you are able to shift an existing domain between registrars as well.