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###📡 Amateur & Utility Radio Monitoring

• WebSDR.org - Global network of publicly accessible SDR receivers
• KiwiSDR Network - Interactive map of KiwiSDR receivers for HF/VHF/UHF monitoring

###📡 Radiostations resources

• Radio Garden - Interactive global map of radio stations

• Numbers Station Research & Archive - Database and live schedule of known number stations
• HF Underground - Logs of pirate, utility, and number station receptions
• Enigma 2000 - Community focused on identifying and cataloging mysterious radio signals

###🚔 Public Safety & Aviation

• Broadcastify - Live police, fire, EMS, and aviation feeds worldwide
• LiveATC.net - Global live streams of air traffic control communications
• MarineTraffic Radio (AIS Feeds) - Marine AIS transponder data and related VHF radio info

• N2YO.com - Live satellite tracking and radio frequency info
• SatNOGS Network - Global open network of satellite ground stations
• Heavens-Above - Satellite pass predictions and amateur radio satellite data

• Frequency Database - Comprehensive global frequency listings and live feeds
• High Frequency Coordination Conference - Official frequency schedules of shortwave broadcasters
• EiBi Shortwave Database - Regularly updated international shortwave schedules

• Reddit Shortwave - Shortwave Reddit Thread
• HF Underground Forums - Underground radio forum
• Worldwide Radio Forum (WRTH) - Radio Forum