HF bands
The HF bands are by far the most popular bands in the amateur service. Local contacts and world-wide propagation are all possible at almost anytime with careful selection of the right frequency for the time of day, time of year, and current state of the sunspot cycle. For specific characteristics of each band, click on the links below.

The 3.5, 7, 14, 21 and 28MHz bands are the bands where contests can be found. The 10, 18 and 24MHz bands, also known as the WARC bands, are kept free of contest activity by international agreement, which now also includes the 5MHz band.

80 Metres  3.500 to 3.800 mhz
60 Metres  5mhz
30 Metres  10.100 to  10.150 mhz
20 Metres  14.000 to  14.350 mhz
17 Metres  18.068 to  18.168 mhz
15 metres  21.000 to  21.450 mhz
12 Metres  24.890 to  24.990 mhz
10 Metres  28.000 to  29.700 mhz
For more information Credits to  Radio Society of Gt Britain and there Link :
   https://rsgb.org/main/operating/band-plans/hf/