Internationaal
- UBA (Koninklijke Unie van Belgische Zend Amateurs) – www.uba.be
- DARC (Deutscher Amateur-Radio Club e.V.) – www.darc.de
- RSGB (Radio Society Great Britain) – www.rsgb.org
- ARRL (American Radio Relay League) – www.arrl.org
- AMSAT-NA (Radio Amateur Satellite Corporation North America)
- AMSAT Nederland
- AMSAT-UK
- AMSAT-DL
- International Space Station ISS