ITU Radio Bands(国际电信联盟) -- From wiki pedia https://en.wikipedia.org/wiki/Extremely_low_frequency
Name Frequency F.Unit(hertz) Wave Length Full Name
ELF 3-30 Hz 100km~10km Extremely Low Frequency SLF 30-300 Hz 10km~1km Super Low Frequency ULF 300-3000 Hz 1km~100m Ultra Low Frequency VLF 3000-30000 Hz 100m~10 Very Low Frequency
LF 30-300 MHz 10~1km Low Frequency MF 300~3000 MHz 1000~100m Medium Frequency HF 3000~30000 MHz High Frequency VHF 30~300 GHz Ultra High Frequency UHF 300~3000 GHz Super High Frequency SHF 3000~300000 GHz Very High Frequency EHF 300000~3000000 GHz THF 3000000~30000000 GHz Terahertz High Frequency