###📡 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