Domain name parking is the process of registering a domain name without immediately using it for a Web site. This saves Web hosting fees. However, in order to register a domain name, you must provide the names of two DNS servers.
These listings include companies willing to allow you to use their DNS servers for parked domains. For the most part, they charge a fee for this service. They may only allow domain name parking if you pay them to register the domain name (not allowing another registrar). They may also tie domain name parking to use of their Web server in the future.