FM broadcasting
VHF Radio waves do not travel far beyond the visual horizon, so reception distances for FM stations are usually limited to 30–40 miles (50–65 km) They can also be blocked by hills or buildings.
AM broadcasting
The frequency ranges given here are those that are allocated to stations. Because of the bandwidth taken up by the sidebands, the range allocated for the band as a whole is usually about 5 kHz wider on either side.
"Longwave" (also known as Low frequency (LF)) (148.5–283.5 kHz) Broadcasting stations in this band are assigned transmitting frequencies in the range 153–279 kHz, and generally maintain 9 kHz spacing. 
Longwave assignments for broadcasting only exist in ITU Region 1 (Europe, Africa, and northern and central Asia), and is not allocated elsewhere. Individual stations have coverage measured in the hundreds of kilometers, however there are only a very limited number of available broadcasting slots.