|The UN's Vienna International Center|
(Photo courtesy Wikimedia Commons)
According to Southgate Amateur Radio News, the C7A-C7Z call sign block is allocated to the World Meteorological Organization, while 4YA-4YZ is allocated to the International Civil Aviation Organization. The calls will be used in connection with special events, such as World Meteorological Day or International Civil Aviation Day. For DXCC purposes, the calls will count as Austria, not the UN, according to the report.