The World Wide Web uses unique numbers identified as IP addresses and every single unit or site that is a part of the Web contains such an address. It is pretty difficult to remember to go to 188.8.131.52 to see a website though, so a much quicker structure was introduced in the 1980s - domain names. Each and every domain features a primary part plus an extension, for example domain.com or domain.co.uk. Various extensions exist worldwide - part of them are assigned to countries, such as .co.uk in the aforementioned example, which is given to the United Kingdom, while many others are generic, like .com or .net. Some extensions are available for registration by any entity and others have certain requirements - business registration, local presence, etcetera. You are able to obtain a new domain name through a registrar company like ours and if the extension supports domain transfers, you're able to relocate an existing domain name between registrars too.