Who uses HF radio?

The band is used by international shortwave broadcasting stations (2.310 – 25.820 MHz), aviation communication, government time stations, weather stations, amateur radio and citizens band services , among other uses.

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Which band has lowest frequency?

ITU Band nameAbbreviationFrequency and WavelengthExtremely low frequencyELF3–30 Hz 100,000–10,000 kmSuper low frequencySLF30–300 Hz 10,000–1,000 kmUltra low frequencyULF300–3,000 Hz 1,000–100 kmVery low frequencyVLF3–30 kHz 100–10 kmRadio spectrum – Wikipedia en.wikipedia.org › wiki › Radio_spectrum

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