AARC |
Aruba Amateur Radio Club 
|
AARC |
Accra Amateur Radio Club |
AATiS |
Arbeitskreis Amateurfunk und Telekommunikation in der Schule 
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AAW |
Antarctic Activity Week |
AB |
All Band (Contest) |
ABC |
Australian Broadcasting Corporation |
ACG |
Alabama Contest Group  |
ACMA |
Australian Communications and Media Authority |
ADIF |
Amateur Data Interchange Format |
ADL
|
Austrian District Locator |
Admiralty |
Admiralty List of Lights and Fog Signals |
ADXB |
Austrian DX Board 
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AFVL |
Amateur Funk Verein Liechtenstein 
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AGCW |
Arbeitsgemeinschaft Telegraphie 
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AGDX |
Arabian Gulf DX group |
ALARA |
Australian Ladies Amateur Radio Association 
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AMISOM |
African Union Mission in Somalia |
AMRA |
Association Mosellane des Radio Amateurs 
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AMRS
|
Austrian Military Radio Society 
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AMSAT |
Radio Amateur Satellite Corporation  |
ANARE |
Australian National Antarctic Research Expeditions |
ANZAC |
Australian and New Zealand Army Corps |
AOTA
|
Airfields on the Air |
ARA |
Amateurs Radio Algeriens 
|
ARAF |
Associação dos Radioamadores de Florianopolis |
ARAL |
Almaty Amateur Radio League |
ARAM |
Associação de Radioamadores do Alto Minho |
ARARM |
Asociacion de Radio Aficionados de la Republica Mexicana 
|
ARAT |
Association des Radio Amateurs Tunisiens |
ARBA |
Associação de Radioamadores da Beira Alta |
ARBB |
Associação de Radioamadores da Beira Baixa |
ARC |
Associação Radioamadores de Coimbra |
ARDF |
Amateur Radio Direction Finding |
AREG |
Amateur Radio Experimenters Group |
ARES |
Amateur Radio Emergency Service |
ARFI |
Associazione Radioamatori Finanzieri Italiani |
A.R.I. |
Associazione Radioamatori Italiani 
|
ARISS |
Amateur Radio on the International Space Station 
|
ARL |
Almaty Radio Amateur League |
ARLHS |
Amateur Radio Lighthouse Society 
|
ARM |
Amateur Radio Society of Moldova  |
ARMI |
Associazione Radioamatori Marinai Italiani 
|
ARRAM |
Association Royale des Radio Amateurs du Maroc 
|
ARRL |
Amateur Radio Relay League 
|
ARSATC |
Amateur Radio Satellite Community |
ART |
Amateur Radio Taipei |
ARU |
Algerian Radio Amateur Union |
ATNO |
All Time New One |
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