Numbers stations and the mysterious channel markers of shortwave on the timelines of your cities: the regular transmissions of E11, E06, E07, S06, S11a and V07, the day and night frequencies of The Pip and The Squeaky Wheel, and UVB-76, "The Buzzer", on the air around the clock since at least the early 1980s.
Numbers stations read out groups of digits or letters in a synthetic voice, on fixed schedules, with no explanation. They are widely believed to send messages to intelligence agents, and no government officially admits running them. Monitors have catalogued them for decades and given them names: E11, the most active station on this calendar, is attributed to Poland; E06, E07, S06 and V07 are traced to sites in Russia, from Moscow to Khabarovsk. The channel markers are a different mystery: UVB-76, The Pip and The Squeaky Wheel send the same sound day and night, and only rarely break into a coded voice message.
Each numbers transmission lasts about ten minutes and moves between frequencies from day to day, which makes a timeline the easiest way to catch one: it shows the next transmission in your own time zone. Schedules come from hobbyist monitoring and change without notice.
Select a transmission for its frequencies and a link to listen live on a web receiver.
UVB-76, also known by its call sign MDZhB, transmits around the clock on 4625 kHz: a short repeating buzz, interrupted now and then by voice messages in Russian. It is often called Doomsday Radio.
Numbers stations transmit on fixed weekly schedules, usually for ten minutes at a time. E11, attributed to Poland, is the most regular, with dozens of transmissions a week; E06, E07, S06, S11a and V07 also appear on the timeline at your local time.
Two Russian channel markers that, like UVB-76, send a repeating sound around the clock with occasional voice messages. The Pip uses 3756 kHz at night and 5448 kHz by day; The Squeaky Wheel uses 3364 and 5367 kHz.
They are designations from the ENIGMA classification used by numbers-station monitors: E stands for English, S for Slavic languages and V for other languages, followed by a number for each station.
Yes. Each transmission has a Listen live link that opens the University of Twente WebSDR in the Netherlands, tuned to the frequency. Stations aimed at Russia or the Far East may be weak there.
In Shortwave. Perfect Clock — a world clock with your calendar across time zones.