Select it in your register account area. Most registers will allow you to have the option of public or private. Most not all registers have a small fee for this option.
kaled
7:44 pm on Sep 22, 2009 (gmt 0)
Privacy cannot be applied to all domains - for instance, I don't think you can hide registration details for .us domains (but I could be mistaken).
Kaled.
RionM
10:15 pm on Oct 2, 2009 (gmt 0)
You can ask your domain provider to whoisprotection, i've received it for free. That's the way i've done it.