Reserved names as site codes in SMS 2003 SCCM 2007 or System Center 2012 - Configuration Manager

When it comes to choosing site codes you have 3 characters to play with, and while crafting a new site code you should be aware there are a bunch of reserved site codes that cannot be used, these are AUX, NUL, PRN, CEN.

There is a KB for this, it has applied to all versions of the product since inception. You can find the KB here

http://support.microsoft.com/kb/279868

Its very tempting to use CEN for your CENtral, and PRN may match a region if you use those airport code or location codes.

Hope this will help you :)
Amarpal Singh Sandhu