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Associazione Radioamatori Marinai Italiani 

ARI - Associazione Radioamatori Italiani

RSGB International HF & IOTA 

Mediterraneo Dx Team

I.N.O.R.C.

IOTA Contest

Diamond DX Club

Fists CW Club
Qsl.net

Crazy DX Group
DX News  (DJ5AV) ARRL DX Bulletins
DX-Central.com 425DXNews - 
QSL Address List -  QSL Manager List DX Summit
WD4NGB DX PAGE Manager Database Server
Welcome to QRZ! The DX Notebook
RW1QM QSL-info System IK4LZH QSL Info System
Callbook italiano Buckmaster's World Wide Ham Call