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International Amateur Radio Union (IARU)
American Radio Relay League (ARRL)
Radio Amateurs of/du Canada (RAC)
Radio Amateur du Québec Inc. / Fédération des clubs radioamateurs du Québec (RAQI)
International, national, and regional organizations
Contesting
WA7BNM Contest Calendar
3830scores.com
HF contesting guidelines
Band plans
ARRL band plans
RAC band plans
Logging software
DX Zone (logging software list)
eQSL (logging software list)
Log4OM
N1MM Logger+
Ham Radio Deluxe
DXLog.net
Parks on the air (POTA)
Park list
POTA information
Principles of ham radio operation
DX Code of Conduct
The Golden Rule
IARU Ethics and operating procedures for the radio amateur