"The Buzzer", known among Russian listeners as "Жужжалка" (Zhuzhzhalka; English: Hummer), is a Russian military commandment network serving the Leningrad Military District. It broadcasts around the clock on 4625 kHz.

While no other traffic is being sent, the station emits its signature channel marker. The traffic consists mainly of the "Monolith" type messages. This station also transmitted "Uzor" type messages and Command messages, but they stopped appearing on this radio network after 2022.

The Buzzer is controlled from the Sudak Communication Hub ("Agalatovo"). It has a number of transmitter sites, which are switched between often; some of the identified ones include the 69th Communication Hub ("Iskra") and the 60th Communication Hub ("Irtysh"). The structure is built using old equipment that is prone to failure, and suffers from channel separation issues.

Activity Breakdown

Although The Buzzer may broadcast traffic at any time, the vast majority of messages are sent during local daytime on weekdays. The local time for the Buzzer is Moscow Time (UTC+3).

Recipients

As of 2026, The Buzzer broadcasts messages to the following callsigns (only the ones after 2021 are included):

5ТИД, 8Т7И, А743, БХВС, ВЛКА, ВМ68, Г6ОЦ, ДХГЕ, ЕФУГ, ЗЛД4, ЗМО9, И4ГЛ, И8М7, ЙЦМП, ЛФБ9, НАЖЫ, НВСБ, НРВЖ, ОДВР, РХ51, ТОД3, У352, УЛВН, Х2С1, ЦЖАП

History

The station was first reported in the 1970s. Prior to 1990, its channel marker was a short, high pitched tone emitted every two seconds.

Until September 2010, The Buzzer served the former Moscow Military District. It transmitted from the now abandoned 143rd Communication Hub in Povarovo near Moscow, and used the collective callsign УЗБ76 ("UZB76") in its messages.

Since September 2010, The Buzzer served the Western Military District; some facts about the station move can be found here (in Russian). The activity has also significantly increased due to a much larger coverage area.

After the dissolution of the Western Military District in February 2024, The Buzzer now serves the Leningrad Military District.

Since 2010, The Buzzer has gone through a succession of different collective callsigns in its messages:

• 7 September 2010 - 28 December 2015: МДЖБ ("MDZhB")
• 28 December 2015 - early 2019: ЖУОЗ ("ZhUOZ")
• Early 2019 - 30 December 2020: АНВФ ("ANVF")
• 30 December 2020 - present: НЖТИ ("NZhTI")