The term hostname refers to the unique part that identifies a host on the Internet. In www.noip.com , www is the hostname. In that same example, noip.com is the domain name. The host portion prepended to the domain name is often referred to as the hostname and that is how we use the term here. So, in summary, www is the host, no-ip.com is the domain, and www.no-ip.com is the hostname. Our free dynamic DNS service offers free hostnames on our domains i.e. yourname.ddns.net. If you would like hostnames on your own domain name, you will need to register the domain and purchase Plus Managed DNS. Plus Managed DNS allows you to create up to 50 hostnames on your very own domain.