A cryptic shortwave radio broadcast has emerged amid escalating tensions between the United States, Israel, and Iran. The transmission, consisting of a man’s voice rhythmically reciting strings of numbers in Persian, began coinciding with the onset of US-Israel military action against Iran on February 28. The broadcast repeats twice daily, operating with clockwork precision.
The Signal’s Origin and Purpose Remain Unclear
According to Priyom, an organization specializing in the analysis of military and intelligence radio use, the signal originates from a US military base in Böblingen, Germany—specifically, a shortwave transmission facility within a restricted training area near the 52nd Strategic Signal Battalion. However, the identity of those behind the broadcasts and their intended recipients remains unknown.
The transmissions consist of five to six segments, each up to 20 minutes long, and begin with the Persian word for “Attention!” before the numerical sequences commence. Five days into the broadcasts, attempts to jam the frequency were detected, prompting the transmission to shift to a different wavelength.
Numbers Stations: A Legacy of Cold War Espionage
Radio communication experts believe this broadcast is likely a modern iteration of a Cold War-era practice known as number stations. These stations are shortwave radio broadcasts that transmit seemingly random strings of numbers or codes, functioning as encrypted messages for intelligence agencies.
As former US intelligence officer John Sipher explains, “For intelligence agencies, it is important to communicate with their spies to gather intelligence… This is not always possible in person… This is where number stations come in.”
While the use of number stations dates back to the First World War, they gained prominence during the US-Soviet Cold War, enabling governments to communicate with agents discreetly. The randomness of the numbers ensures the message can only be deciphered by those possessing a pre-arranged codebook.
Why Now? The Revival of Analog Methods
The emergence of a new number station during a major geopolitical conflict is unusual, given the availability of modern, secure communication technologies. Yet, current conditions in Iran—including widespread internet shutdowns and restrictions on secure applications—may be driving a return to analog methods.
As Latvian historian Maris Goldmanis notes, “Shortwaves can be received over large distances… all you need is a technically valid shortwave radio and a location free from interference.”
The Iranian government has already responded by attempting to jam the signal, a tactic previously used against Radio Farda, Voice of Israel, and Voice of America. The transmission shifted frequencies in response, suggesting a deliberate effort to evade interference.
Potential Theories Behind the Broadcast
The purpose of the station remains speculative. Theories include:
- Iranian Intelligence: The broadcast could originate from Iran itself, serving as a workaround for disrupted covert communication channels.
- US/Israeli Intelligence: The signal may be intended for allies or assets inside Iran.
- Disinformation: The broadcasts could be a deliberate attempt to confuse Iranian security forces.
Regardless of its true purpose, the station’s timing, structure, and suspected origin point to an active intelligence operation unfolding in real time. The revival of such methods highlights the persistence of covert communication in a world increasingly reliant on digital technology.
The emergence of this numbers station underscores that even in the age of satellites and encrypted messaging, old-school methods can still serve a purpose, particularly in times of crisis.
