4Y1A on 30 m

A very interesting call sign appeared on 10104 kHz CW this morning: 4Y1A. This prefix is allocated to the ICAO (International Civil Aviation Organization) and operates from the UN station in Vienna, Austria (home of 4U1VIC). ICAO is a specialized agency of the United Nations with HQ in Montreal, Canada. 

I hope to receive their QSL soon...

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