Numbers stations are shortwave radio stations from the Cold War that broadcast cyptic messages to operatives out in the field. Some number stations are still in operation today and have been picked up on some of our live broadcasts. There are even recordings of captured numbers station transmissions in our archive.

This page contains more information about Numbers Stations, how to listen to them and how to make your own.

Search and listen to Numbers Stations

Guide to making your own Numbers Station

FM transmitter modification hack

Microbit transmitter rig

Encrypt/decrypt your own messages (includes read out function)

Broadcast your own messages with a Raspberry Pi Zero

Don't forget, these projects are just for fun so obviously check the laws in your area before experimenting yourself!