The International Amateur Radio Union (IARU) is a federation of national associations of certified radio amateurs, representing over 150 countries and separate territories around the world.

The three IARU Regions are organised to broadly mirror the structure of the International Telecommunications Union (ITU) and its related regional telecommunications organisations. The Regions comprise:
- IARU Region 1: Europe, Africa, the Middle East and Northern Asia
- IARU Region 2: The Americas
- IARU Region 3: Asia-Pacific

The IARU represents the interests of the Amateur Radio Service worldwide to relevant international organisations, promoting the interests of amateur radio and seeking to protect and enhance its spectrum privileges.

OTH Radar from Iran on 10 m

The Over The Horizon (OTH) Radar from Iran is daily transmitting on our 10 m-band, often long lasting on 28245 kHz. You can hear a high and a low tone, corresponding to the sweeprates of 870 and 307 sweeps/sec. The system is  about 60 kHz wide, the splatters are covering +/- 250 kHz. The Austrian, Dutch, Swiss and German PTTs have been informed. For more information click here!