The Buzzer is fifty years old and still nobody will say what it is for
2026-07-02 · EA5IYR
Tune to 4625 kHz and you will hear a buzz. It repeats about twenty-five times a minute, it has been doing so for most of fifty years, and on the rare occasions it stops, a voice reads a short message and the buzz comes back.
This is UVB-76, universally called The Buzzer. It is probably the most listened-to signal on shortwave that nobody can explain. What is actually documented
More than people assume. Priyom describes it as a Russian military commandment network, and has traced which command it answers to over time.
It served the Moscow Military District until September 2010, then the Western Military District, and since February 2024 the Leningrad Military District. Control sits at Saint Petersburg's 60th Communication Hub, callsign Vulkan. Transmissions have been identified from the 69th Communication Hub (Iskra) and the 60th (Irtysh); earlier they came from the 143rd, near Moscow.
The buzz itself is not the point — it is a channel marker. It says this frequency is occupied and this network is alive. In the 1970s the marker was a short, high-pitched tone every two seconds rather than the buzz we know now. The messages
When the buzz stops, what follows is a Monolith-format message, read live by a male or female voice — not a recording, which is itself worth noticing.
The shape is consistent: a collective callsign, then a sequence of numbers, then words. Since December 2020 the collective callsign has been НЖТИ. A typical transmission reported by Newsweek ran as a voice reading the names Nicolai, Zhenya, Tatyana and Ivan — spelling NZhTI — then the numbers 38 965 78 58 88 37, then Olga, Tatiana, Elena, Leonid, spelling OTEL, hotel.
David Stupples of City University of London put the attribution simply: "It is almost certainly the Russian government that is using it. If it is the Russian government, it wouldn't be for peaceful purposes."
What the messages mean is not documented anywhere, by anyone, and Priyom does not pretend otherwise. About that June 2026 spike
On 24 June 2026, monitoring groups and the Telegram channels that track the station logged around twenty voice messages in a single day — the first at 09:11 MSK, the last at 17:10 MSK, with seven of them inside twenty-six minutes at the end. Against a baseline of long silences, that is extraordinary.
It is worth being careful about what that means. The logs come from the monitoring community rather than any official source, and while activity spikes do tend to cluster around periods of tension or exercises, no verified link has ever been established between a Buzzer transmission and a specific real-world event. The pattern is real. The causation is not evidenced.
This is the trap the station sets for everyone who listens to it. A channel marker that runs for decades, punctuated by messages you can hear perfectly and cannot read at all, is an almost perfect surface for projection. Roughly every spike has been read by someone as a nuclear signal. None has been one yet. Listening yourself
4625 kHz, upper sideband, any hour. From Western Europe it comes in reliably after dark; from further away, use a WebSDR receiver in Russia or the Baltic and you will hear it as clearly as a local.
You will almost certainly just hear the buzz. That is the normal state, and it is the whole point: the marker exists to be boring, so that the one minute it stops is unmistakable.
---
Sources: Priyom.org, Newsweek, community monitoring logs.