The World Wide Web is based on unique numbers called IP addresses and each unit or site that is part of the Web has this kind of an address. It would be pretty difficult to remember to visit 126.96.36.199 to open a website though, that's why a much simpler structure was launched in the eighties - domain names. Every domain name contains a primary part plus an extension, to give an example domain.com or domain.co.uk. Many different extensions exist worldwide - some of them are given to countries, such as .co.uk in the aforementioned example, which is assigned to the United Kingdom, while many others are generic, for instance .com or .net. Many extensions are available for registration by every entity and others have particular requirements - business registration, local presence, etc. You can acquire a brand new domain through a registrar company such as ours and when the extension allows domain name transfers, you can relocate an existing domain name between registrars as well.