Once you determine which hosting provider you will use, you must change the name server information on your account to unpark, or activate your domain name.

To Unpark (Activate) Your Domain
Log in to your Account Manager.
In the My Products section, select Domain Manager.
Use the checkbox(es) to select the domain name(s) you want to modify.
Click Nameservers.
Select whether you want to use the Hosting nameservers, Parked nameservers, or your own Custom nameservers.
If you selected Custom nameservers, enter your nameservers. You must enter at least two nameservers for your domain.
Click OK.

It takes about 4-8 hours for .com and .net domains and about 24-48 hours for all other domain extensions before nameservers on other networks are able to access the information after the central registry receives it. This period is referred to as the propagation period.