Buzzer activity on shortwave 2025

Shortwave enthusiasts around the world may have noticed a recent increase in activity from Russian military commandment network commonly known as “The Buzzer”.

The Buzzer operates 24/7 on 4625Khz using USB mode and uses male and female announcers. The station has been operating in various forms and under a variety of callsigns since the 1970’s. Originally using the callsign UBV-76, the current callsign is NZhTI.

When no traffic is being sent, the station emits a frequency marker signal to ensure the frequency is not used by other stations. It is believed that the station services the Russian “Western Military District”.

Conspiracy theories abound regarding the purpose of these broadcasts. Maybe it’s a doomsday device monitoring for nuclear attacks, maybe it’s a spy network, possibly its an emergency channel to be used during conflict, or a Russian submarine communications system.

Monitoring enthusiasts received 24 abnormal transmissions on December 11 2024. A total of 30 words were broadcast in contrast to the normal buzzing sound.

Its easy to listen to “The Buzzer” these days. Just select an on online SDR in Sweden or another Scandinavian country and listen on 4625 Khz USB. You will hear and see the signal in real time.

For a list of KiwiSDR receivers around the world, visit: http://kiwisdr.com/public/