The World Wide Web uses unique numbers called IP addresses and each device or site that is part of the Web has this type of an address. It really is pretty hard to remember to visit 126.96.36.199 to open a website though, so a much quicker system was introduced in the 1980s - domain names. Every domain is made of a primary part and an extension, to give an example domain.com or domain.co.uk. A plethora of extensions exist worldwide - some of them are assigned to countries, such as .co.uk in the aforementioned example, which is given to the United Kingdom, while others are generic, like .com or .net. Some extensions are available for registration by every entity and some others have specific requirements - company registration, regional presence, and so on. You can acquire a new domain name from a registrar company like ours and if the extension supports domain name transfers, you can move an existing domain between registrars too.