After some time, you can just visit the WSPR.org web site and view who has been able to hear the little low-power transmitter. Of course, you don’t need a dedicated beacon do pull this off.

LAWTON, Okla. (KSWO) - There have been some recent updates regarding concerns about the ongoing repair work in Altus which ...

WSPR sends a compressed 50-bit message that encodes the station’s callsign, the grid location, and the transmitter power. The message is modulated using frequency-shift keying at a very low bit ...