The World Wide Web is based on unique numbers referred to as IP addresses and every device or web site that is part of the Web has such an address. It is very difficult to remember to go to 123.123.123.123 to open a website though, that's why a significantly simpler structure was made in the eighties - domain names. Every domain consists of a primary part and an extension, to give an example domain.com or domain.co.uk. A large number of extensions exist globally - some of them are given to countries, for example .co.uk in the abovementioned example, which is assigned to the United Kingdom, while others are generic, like .com or .net. Various extensions are available for registration by any kind of entity and some others have particular requirements - company registration, local presence, and so on. You will be able to get a new domain from a registrar organization like ours and if the extension allows transfers, you're able to shift an existing domain name between registrars as well.