Electromagnetic Spectrum

Frequency Wavelength General Designation NATO Band US Band
30-3 kHz 10,000-100 km ELF
3-30 kHz 100-10 km VLF
30-300 kHz 10-1 km LF
300 kHz-3 MHz 1,000-100 m MF
3-30 MHz 100-10 m HF A
30-230 MHz 10-1.3 m VHF A
230-250 MHz 1.3-1.2 m VHF A P
250-300 MHz 1.2-1 m VHF B P
300-500 MHz 100-60 cm UHF B P
500-1,000 MHz 60-30 cm UHF C P
1-2 GHz 30-13 cm UHF D L
2-3 GHz 15-10 cm UHF E S
3-4GHz 10-7.5 cm SHF F S
4-6 GHz 7-5.5 cm SHF G C
6-8 GHz 5-7.5 cm SHF H C
8-10 GHz 3.75-3 cm SHF I X
10-12.5 GHz 3-2.5 cm SHF J X
12.5-18 GHz 2.5-1.6 cm SHF J Ku
18-20 GHz 1.6-1.5 cm SHF J K
20-26.5 GHz 1.5-1.1 cm SHF K K
26.5-30 GHz 1.1-1 cm SHF K Ka
30-40 GHz 10-7.5 mm EHF K Ka
40-60 GHz 7.5-5 mm EHF L mm
60-100 GHz 5-3 mm EHF M mm
100-300 GHz 3-1 mm EHF

Notes: Three overlapping descriptive systems are used in the West.
General designations are Extremely Low, Very Low, Low, Medium, High, Very High, Ultra High, Super High and Extremely High Frequency.
Frequencies are measured in kilo (1,000), mega (1,000,000) and giga (1,000,000,000) cycles per second (Hertz); wavelengths measured in kilometres, metres, centimetres and millimetres.
'NATO' bands describe radar and electronic warfare equipment; 'US' bands are used for radar and satellite communications. The latter's bounds are slightly 'elastic'.
Aircraft-to-ground voice communications for air traffic control and similar purposes (including ground ration beacons) uses 108-136 MHz in the VHF band and 225-400 MHz in the V/UHF bands, the latter principally military, and not entirely accurately termed 'UHF'.