Typically called “Number stations” clandestine use of High Frequency Radio remains a reliable means of sending messages. Stations commonly transmit on a set or predictable, rotating schedule.
In the absence of internet for communications, HF can be a long-distance fall-back for state and non-state actors.
Priyom.org – Is an international organization documenting intelligence, military and diplomatic use of shortwave radio. They recently published the details of a new source first heard on February 28th: A Persian-language (Iranian) numbers station, designated V32.
V32 went on-air just before Iranian Internet access was disconnected.
V32 broadcasts daily on 7910 kHz at 02:00 and 18:00 UTC, featuring live or prerecorded voice messages and dual-tone, 620 Hz / 925 Hz background beeps.
Key Details About V32 (Iranian Station):
Station Designation: V32.
Language: Persian (Farsi).
Frequency: 7910 kHz (Upper Sideband).
Schedule: Daily at 02:00 and 18:00 UTC.
Characteristics: Uses the word tavajjoh (attention) to separate number groups.
Origin: While associated with Iran due to the language, some reports suggest signals may originate outside Iran, potentially near the Red Sea, based on direction-finding.
Purpose: Believed to be used for transmitting encrypted, one-time pad messages to intelligence agents or military personnel.
Numbers stations are shortwave radio broadcasts used for covert, secure, analog communication that is immune to cyberattacks.
Coos County Radio Club 