For decades, listeners tuning to 4625 kHz have heard a strange Russian signal known as UVB-76 or the Buzzer, a nearly continuous broadcast interrupted only occasionally by coded voice messages, odd ...

For the first time in a history that stretches back nearly 40 years, the mysterious Russian radio signal popularly known as UVB-76 had issued an order. On Jan. 24, 2013, it was heard clearly by its ...

During the Cold War, numbers stations became prolific as high-security, low-risk spy tools to send secret messages to operatives in the field. However, as early as World War I, espionage agencies were ...

A strange buzzing signal has been repeating endlessly on the frequency of 4625 kHz since the mid-1970s In 2025, the Buzzer’s activity spiked dramatically, including transmissions during a phone call ...