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' ...

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.

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

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 ...