Who is transmitting on which frequency?

Amateur radio uses different frequency bands for different types of communication and distances. In general, licensed radio amateurs operate on frequency bands assigned by the International Telecommunications Union and national authorities. These bands range from 1.8 MHz (160 meter band) to 250 GHz and above. Each band has specific properties and is therefore used for different purposes: - Shortwave (1.8 MHz to 30 MHz): Suitable for international communication over long distances through reflection from the ionosphere. - VHF (144 MHz to 148 MHz): Used for local and regional communications with clear and interference-free transmission. - UHF (430 MHz to 440 MHz): Similar to VHF but tends to have a shorter range, suitable for urban environments and for use in conjunction with relay stations. Each band has different segments reserved for different transmission modes such as telephony, CW (Morse code), digital modes and satellite communications. Radio amateurs choose the frequency according to their license class, desired communication mode and current propagation conditions. The current frequency plan can be viewed on the Federal Network Agency's website. This provides precise information about which frequency ranges are intended for which radio service.