The callsign block C7A-C7Z is allocated to World Meteorological Organization (WMO) and 4YA-4YZ is to International Civil Aviation Organization (ICAO). VIARC is currently operating a UN amateur radio station with the callsign 4U1VIC at the Vienna International Centre which hosts numerous UN organizations and other international organizations.
Changes to the Log4OM Country file to reflect the above change in call sign block assignments
Country File Update-Mar 27, 2014
Country File Update-Mar 27, 2014
K7PT-Chuck "#1 Top of the Honor Roll"