 At present, The Buzzer appears to be broadcast only from the 69th Communication Hub in Naro Fominsk, Moscow.In 2011, a group of urban explorers claimed to have explored the buildings at Povarovo to find an abandoned military base and, in it, a radio log record confirming the operation of a transmitter at 4625kHz.Besides the main callsign, there have been transmissions containing different callsigns such as