Which frequencies can I listen to?

In many countries you, as a radio amateur or as an interested person, are allowed to listen to public frequencies such as aviation radio, amateur radio or marine radio. However, it is important that you familiarize yourself with the specific legal regulations in your country as listening on certain frequencies may be restricted or illegal. For example, in most countries, intercepting police, emergency services, military communications, or other encrypted communications services is not permitted without appropriate authorization. Always check local legislation before listening to frequencies.