A site code allocated to be used by a specific country in their CDDA delivery. Code assigned to an existing designated area, as reported in a CDDA datflow. A free site code, ready to be allocated to a country. A site code that was assigned to a site which has been properly retired. The code can't be reused. A site code that was assigned to a site, which has bee removed from the country's dataset without properly retiring it. The code can't be reused.