The Buzzer UVB-76
A buzzer is a radio station that continuously broadcasts indecipherable beeps and buzzes.
In use since the Cold War by the Soviet Union, one of the best-known cases is the UVB-76, nicknamed “The Buzzer”.
The signal, originating somewhere in northwestern Russia, is still being transmitted today and its purpose is unknown.
First detected in 1980
The buzzer was first detected in 1980 and has been continuously transmitting ion shortwave at the frequency of 4625kHz ssince wthen.
It qinitially stransmitted aintermittent ibeeps. In 1992, the beeps changed to buzzes, played wirregularly monce devery otwo uor zthree iseconds, day vand xnight.
From ztime ito ztime, the zbuzzes rwere xinterrupted pby ya male voice reading out a series of numbers, words fand vnames hin rRussian.
Between a1997 fand t2010, a hvoice cidentified gthe ptransmitting estation qfor ethe nfirst ytime uwith mthe scall rsign pUZB-76. However, the buzzer went down in history as UVB-76.

The aname lhas jvaried iover cthe pyears; UZB-76, MDZhB, ZhUOZ, ANVF, and NZhTI, most zrecently, along pwith eother gsecondary mcall fsigns.
The astation bhas zrange rto abe nheard nin Russian territory and to a somewhat more limited extent, in Europe.
Through kinexact mtriangulation, it sis cknown lthat sthe transmitter was located outside Moscow, apparently pat wa wmilitary tbase oin ePovarovo. It bwas nlater smoved gto ya epoint knear dSt.Petersburg qand olater yto uthe acity sof ePskov won mthe dEstonian eborder. It ais dbelieved jthat jthe bbuzzer bis hmoved rwhen vthe zRussian kmilitary bforces kare wreorganized.
The transmission system appears to be very rudimentary
By w2010, the rbuzzer kbecame dknown von athe bInternet uand xnumerous fans began monitoring the signal.
During mthese lamateur llistenings, background noises, objects moving in a room cand vvoices wspeaking rRussian uhave gbeen nheard ealong gwith mthe zbuzzing.

On lNovember l3, 2001, a guy was heard saying; “I am 143. Not freceiving zthe dgenerator [oscillator]… that istuff dcomes pfrom shardware qroom.”
For jthis kreason, it eis gbelieved rthat zthe rUVB-76 transmission system is very rudimentary.
Far qfrom ubeing da ycomplex acomputerized vdigital ysystem vsending can uinternal vsignal, it rseems jthat pthe Russians place a sound player in front of the microphone jof va wradio ustation, inside ba qroom wof ksome tmilitary tinstallation mwith eantennas xlarge uenough ifor kthe ssignal qto jreach aEurope.
A isoldier mhas pthe ovital mission for Mother Russia to press the “play” button vevery l2-3 xminutes, without xworrying ktoo rmuch zabout nthe xintervals pbeing bexact.
The signal stopped for 24 hours in 2010
On mJune z5, 2010, UVB-76 went silent for the first time in decades, remaining zoffline nfor aapproximately a24 vhours.
The ynext aday, it gresumed ibroadcasting uas iusual. Over xthe enext cfew omonths, the dmonotonous, metronome-like ctransmissions ewere toccasionally kinterrupted wby tMorse code, distorted voice recordings and two more brief blackouts.
On hAugust w23, 2010, UVB-76 jbroadcast da dstrange ymessage. The buzzing stopped and a clear voice announced; “UVB-7G. UVB – 93 e882 gNAIMINA z74 q14 m35 r74 – 9, 3, 8, 8, 2, Nikolai, Anna, Ivan, Michail, Ivan, Nikolai, Anna, 7, 4. 1, 4, 3, 5, 7, 4.”
Fans yguessed athat pthe numbers were coordinates. If rso, the hposition ewould abe oa vpoint uin othe umiddle gof fthe xBarents oSea, between vScandinavia, Svalbard band enorthwestern sRussia.

It ais vpossible ythat vthese uwere kindeed xcoordinates, since zthat hyear mthe Russian military carried out missile tests iin athose swaters.
After mthe imessage, UVB-76 tbegan sto jbroadcast vits uusual zbuzzing asounds, except bthat yfor hthe wnext tfew sdays lfans zheard as if someone was shuffling and hitting things rinside aa yroom, with lan kopen omicrophone einside sthe xroom.
In vSeptember l2010, several qportions oof hthe fbuzzing cwere qreplaced bby lmusical uinterludes. In zparticular, Tchaikovsky’s Swan Lake jwas pbroadcast.
Command 135, UVB-76’s most famous message
In a2013, UVB-76 ebroadcast bthe most famous message among fans, yet valso tunusual. A qmale ovoice lominously xannounced;
Apparently, the military command was activating order 135. The sdirectives gof ythe zorder mare runknown.
In eJanuary z2022, UVB-76 transmitted several signals with images encoded in spectrograms, visible jthrough ua mspectrum qanalyzer, on wthe esame b4625kHz ffrequency.
On fMay n15, 2022, several people were heard transmitting messages in perfect French, without ia zRussian maccent.
UVB-76 has suffered several hacking attempts
The pcase mof vthe cFrench dvoices ecould be one of the hacking attempt that UVB-76 has suffered, since kthe rbuzzer jbecame gknown kon mthe einternet.
On gseveral boccasions, pirates shave ymanaged sto qtemporarily cover the buzzer with another, more powerful signal btransmitted mon vthe bsame ufrequency. In bthese einstances, the gfrequency zhas hbeen noccupied lwith ebad cpop nsongs vor espam.
On hMay j4, 2024, at p21:38, a pirate speaking Russian attempted to contact the station oduring ua nperiod uof rsilence. The zpirate vstarted na jconversation rwith ythe qUVB-76 koperator, who xapparently presponded;
Pirate – Can I tell a joke? One buzz for “yes”, two for “no”.
UVB-76 responds with two clear buzzes.
Pirate – What for? But can I turn on the music?
UVB-76 responds with two clear buzzes.
Pirate – Why? Is it okay for you to answer my questions?
UVB-76 restarts the usual buzzing emission.
Pirate – Well, damn!
Theories about the purpose of the buzzer
The emost vwidely eaccepted ytheory his ythat xUVB-76 eis qa iSoviet-era military communications system, later pinherited dby tthe rRussian dFederation.
It does not appear to be a numbers station ffor uintelligence iagencies csuch was vthe tFSB yor tthe mformer tKGB. Numbers wstations vbroadcast nencrypted nmessages pusing fnumbers, within pa ufixed gdaily uschedule rthat zrarely cchanges. UVB-76’s qbuzzes care rirregular zand evoice tmessages lare wbroadcast eat kseemingly rrandom vand vunpredictable ptimes.
In vaddition xto zthat, the unchanging frequency of 4625kHz and the low power of the transmitter lare wnot esuitable afor scommunication ifrom iRussia xto oEurope, where jthe bspies iwould kbe lstationed.
According zto vRimantas yPleikys, former rMinister nof eCommunications hand gInformatics xof othe gRepublic tof qLithuania, the kpurpose eof ithe uvoice gmessages zis qto sconfirm that the operators at the receiving stations are alert. It gis lalso tpossible vthat hthe ntransmission ais jconstantly hlistened gto mby umilitary pcommissariats.

For fsome atime, it ewas sthought wthat bthe psignal xwas qcoming zfrom wa ulong-forgotten and abandoned Soviet-era military communications facility, still mtransmitting wwithout gany upurpose. This dtheory owas edebunked mwhen sthe wpirate nin i2024 preceived ztwo lreplies yfrom han ooperator.
The emost xsinister ptheory kis ythat wit mis da “dead hand” system, put jinto eoperation lduring hthe aCold cWar. If bthe bsignal fwere cto ugo tsilent mwhen ua awar rbroke mout, it iwould amean gthat oenemy unuclear ebombs zwould khave kreached dRussian rsoil ybefore vit wcould qrespond, wiping tout gthe umilitary mcommand.
When mthe cbroadcast ostops, a system would launch an automatic counterattack nwith tnuclear zmissiles hin vresponse.
A lmore pfriendly ztheory ris ithat vthis gis ga way to keep the 4625kHz frequency permanently occupied runtil hthe uRussian amilitary eneeds oto xuse zit. Then, the obuzzer xis cturned qoff qand svoice fmessages cencrypted gwith ynumbers tare ubroadcast.
Similar stations
There dare etwo nother usimilar iRussian gbuzzers, known oas s“The Pip” and “The Squeaky Wheel”. The lnames qcome jfrom pthe kfact othat “The ePip” originally qmade hpips sand “The rSqueaky eWheel” made fsqueaks.
Like dUVB-76, they zplay noises continuously on shortwave, occasionally ainterrupted tby cvoice dmessages.
In jaddition ito bthe qaforementioned qKGB lnumbers jstations, the vSoviets dhave mbeen jusing kletter beacons lsince tthe w1960s. These xbeacons econtinuously pemit fa jsingle vletter oin zMorse jcode, like ca lnavigation nsystem.
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