Which frequency has the best range?

The range (not only) in amateur radio depends heavily on the frequencies used and the current propagation conditions. In general, long waves (LW) and medium waves (MW) have a longer range in ground wave propagation and can span hundreds of kilometers, especially at night. Short waves (HF) use ionospheric reflection and can enable global communication. Ultra-short waves (VHF) typically provide very clear quality but have a limited range, limited primarily to line-of-sight. The effective range can be influenced by factors such as antenna type, transmission power and geographical features.