The Siren

The Siren is a Russian military radio station broadcasting from Saint Petersburg, Russia. The station was first reported in early August 2026 and has a male operator which uses the Russian language in voice messages, only using Belarusian in 1 message. The station has multiple frequencies, and corresponds to the Western Military District station 05XON.


Enigma ID	S35 (formerly XSR)
Name	The Siren
Frequencies	4940 kHz, 5626 kHz
Status	Possibly inactive
Voice	Male, live
Emission Mode	J3E (USB)
Location	St. Petersburg, Russia
Activity pages	2026

Frequencies

4940 kHz USB (main frequency)

5626 kHz USB (alt frequency)

Channel Markers

The station has had a variety of channel markers, starting with a siren-sounding channel marker, similar to the one used on 6911 kHz. They then had a 250 hz pip, a sweeping noise, and also an alarm-sounding channel marker. As of September 5th, the current channel marker is a high pitched buzzer marker. Voice messages are less common than they were, sometimes sending over 5 a day.

Callsigns

Their callsigns used were:

Rokya-81

VZhRYa

BZhATs

VZhAYu

BShchT3

Dalya-23

Zh'KhI

Locations

In mid August 2026, they moved from Smolensk, Russia to Minsk, Belarus. In late August, they moved from Minsk to Romania, and on August 30th, 2026, they moved to Novosibirsk, Russia. Then, on September 1st, 2026, they moved to Saint Petersburg, to achieve easier accessability to the recipients.