That is not a service that comes with registering a new domain, you must obtain it separately. All domain registrations require you to give the addresses of two functioning name servers that will service your domain. That is a required part of the process. Most domain registrars therefore have come to offer free domain parking for your domain name, but this may not be what you think. With Domain Parking the registrar simply adds your new domain to his name servers but instead of pointing to your machine, your parked domain points to an IP owned by the registrar to which all parked domains point.
Parking merely satisfies the registration requirement for two name servers.
In other words, with domain parking you have a domain name that effectively points to nowhere and can not be used for anything. It is merely parked or 'on hold'. If you have a static IP, one that does not change, often the simplest way of doing this is to ask your ISP if they provide this service. There is often a fee associated with this service. Once you have DNS for machine your DNS provider will generally allow you to have additional subdomain names for your machine at no extra cost.