What radio operates between the frequencies of 3000 kHz and 30 MHz?

GPS

Lots of things use these frequencies. There is an amateur radio bad around 1250. Cell phones are around 1800 (and even higher). Microwave ovens are around 2450. WiFi is slightly higher. Bluetooth is in there, and a lot of point-to-point microwave radio links which are used by the phone company to get signals 20 miles or more without wires. Micro Links are also used by radio and television stations to get the signals from their studiOS to their transmitters (STL).

There could even be certain radar, radiotelescope, and satellite frequencies in that band but I am not sure of that.