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GNU Radio Companion - https://www.gnuradio.org/
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Gqrx - https://gqrx.dk/
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SDR-Radio (Windows) - https://www.sdr-radio.com
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CubicSDR - https://cubicsdr.com/
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Universal Radio Hacker - https://github.com/jopohl/urh
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FCC.io - https://fcc.io/
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FCC ID Seach - https://www.fcc.gov/oet/ea/fccid
| Frequency band | Range | Wavelength | Propagation | Note |
|---|---|---|---|---|
| VLF (Very Low Frequency) | 3kHz - 30kHz | 100km - 1km | 5,000–20,000 km | Maritime radio, navigation |
| LF (Low Frequency) | 30kHz - 300kHz | 10km - 1km | ~2,000km | Time standards, maritime radio, navigation |
| MF (Medium Frequency) | 300kHz - 3mHz | 1km - 100m | ~200–300 miles | Marine/Aircraft, navigation, AM broadcast |
| HF (High Frequency) | 3mHz - 30mHz | 100m - 10m | ~100km-300km | Broadcasting, mobile radio, amateur radio |
| VHF (Very High Frequency) | 30mHz - 300mHz | 10m - 1m | ~160km | FM broadcast / TV broadcasting |
| UHF (Ultra High Frequency) | 300mHz - 3gHz | 1m - 100mm | 30–40 miles (48–64 km) | Cell phones, mobile radio, WLAN, Wi-Fi, GPS, 4G mobile |
| SHF (Super High Frequency) | 3gHz - 30gHz | 100mm - 10mm | 30–40 miles (48–64 km) | Radar, TV, satellite communications, 5G mobile, Wi-Fi |
| EHF (Extremely High Frequency) | 30gHz - 300gHz | 10mm - 1mm | ~1km | Imaging / detection applications, astronomy, satellite, radio, 5G mobile |
| THF (Tremendously High Frequency) | 300gHz - 3tHz | 1mm - 0.1mm (100 µm) | N/A | High resolution microwave imaging |