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From HFUnderground

Welcome to HFUnderground.com. This site is dedicated to documenting oddities on shortwave, including pirate radio and numbers stations.

Everyone who is a radio enthusiast is encouraged to add information to the site. Just become a registered user, and you can start to contribute!

• Pirate radio stations
• Spy numbers stations
• Shortwave Broadcast Stations
• Shortwave Utility Stations
• Mediumwave Broadcast Stations
• Longwave Broadcast Stations
• Miscellaneous
• Technical Topics