Numbers station
A Numbers station is a kind of shortwave radio station with unusual broadcasts: very often, these broadcasts consist of numbers that are read by computer-generated voices. Several of these stations exist, numbers are read in different languages. Some stations have operated for a period of more than ten years, using the same frequency.
The purpose of the stations is unknown, along with who operates them. One supposition is that governments use them to communicate with secret agents or spies. As receiving the messages is relatively simple, the agent only needs a world radio receiver.
Numbers Station Media
Cuban numbers station HM01
A recording of The Gong numbers station, operated by the National People's Army of the German Democratic Republic in 1988
The "Russian Man" station signing off. The numbers read: 83912 83912 10080 10080 46543 46543 – 257 257 143 143 – 000 00