FQDN stands for Fully Qualified Domain Name.
It refers to a complete domain name consisting of a host and domain name. The domain name itself is comprised of two parts: the second-level domain and the top-level domain.
So, for the example of www.web-elegance.co.uk, ‘www’ is the host, ‘web-elegance’ is the second-level domain and ‘.co.uk’ is the top-level domain.
You can buy hundreds of TLDs once you are a customer. You may also check the availability of every domain.