Numbers stations - those ghostly shortwave broadcasts where synthetic voices read strings of digits into the void - have been sending one-way coded messages to intelligence agents since World War I.

Shortwave radio listeners around the world have reported hearing mystery broadcasts in Persian on a new 'numbers station' ...

Cold War-Era Number Broadcast Reappears in Iran Conflict U.S. employs shortwave radio to contact Iranian spies amid communication blackouts ...

There are many reasons why old spying methods like number stations are used in an era of encrypted messaging apps, satellites ...

The mysterious Persian-language transmission began about 12 hours after the start of the US-Israeli bombing campaign against Iran. It was jammed five days later. Is it a coded message for US agents in ...

The regime is overmatched militarily, but still has tools for returning fire.

This is one of the coolest things I’ve learned recently: Foreign intelligence agencies still use good ol’ radio to share top secrets. Even with all the powerful tech at their fingertips, radio use in ...