The World Wide Web is based on unique numbers called IP addresses and every single device or site that is part of the Web features this kind of an address. It is very hard to remember to visit 18.104.22.168 to see a website though, so a significantly quicker system was introduced in the 80s - domains. Every domain features a main part and an extension, for instance domain.com or domain.co.uk. A great number of extensions exist worldwide - part of them are assigned to countries, like .co.uk in the aforementioned example, which is assigned to the United Kingdom, while others are generic, for example .com or .net. Some extensions are available for registration by any kind of entity and others have particular requirements - company registration, regional presence, etc. You'll be able to get a new domain name from a registrar organization like ours and if the extension supports domain name transfers, you will be able to relocate an existing domain name between registrars too.