Amateur Radio Band Plans

In Amateur Radio (HAM radio) there are agreements about frequency use and between which frequencies which modes may be used.
Below is an overview of allowed frequencies for the three global regions.

R1 R2 R3
amateur-radio-band-plan-region-1 amateur-radio-band-plan-region-2 amateur-radio-band-plan-region-3
HF Bandplan (source IARU) Region 2 Bandplan (source IARU) Region 3 Band plan (source IARU)
VHF Bandplan ( 50, 70, 144 MHz) US Bandplan (source ICOM) Region 3 Band plan (source PARA)
UHF Bandplan ( 432 MHz, 1.2 GHz, 2.3 GHz)
SHF Bandplan ( 3.4 GHz, 5.7 GHz, 10 GHz, 24 GHz)
µWave ( 47 GHz, 75 GHz, 122 GHz, 134 GHz, 245 GHz)

Source: IARU, Icom and PARA