Proud to be a vast American multinational.
What are "spy numbers" stations?

That's what I'd like to know! 

But seriously.

On the shortwave bands there are a number of strange stations that broadcast long strings of numbers or letters, usually read by an automated voice, usually in five-digit groups. It is generally believed that intelligence agencies use these stations to transmit encrypted messages to agents in the field. Why transmit them over unreliable, anybody-can-hear shortwave radio? I dunno.

Even stranger than these broadcasts are the oddball civilians who listen to them. Why listen to hours of broadcasts which, though transmitted in terms or symbols you can understand, are completely incomprehensible when taken as a whole? For me, I think it's because it reminds me of college. But others may have other reasons.

There's a lot more information and speculation about spy numbers station out there, and there's no need for me to duplicate those efforts here. What I can contribute, however, are some tasty samples of this geeky genre in the unspeakably hip MP3 format. Confuse KaZaa users by putting these in your shared folder:

E25 samples

Recorded in Cairo in early 2001, these are complete broadcasts of E25, a short-lived and ostentatiously Egyptian numbers station.

E10: Mossad Martha

E10 is the Enigma designation for this station, presumed to be connected with Israeli intelligence services. A computerized female voice reads off five-digit groups of letters in the NATO alphabet. Here in Egypt, you can scarcely twist a dial without hearing an E10 transmission.

  • 2 May 2000 on 6428 kHz. The Mossad does a cover of a popular Jackson Five tune, reading the callsign "ABC" for hours on end. I do not believe any message followed. May have been a test transmission.
  • 18 Jan 2000 on 4360 kHz. Generally, callsigns are either followed by a "2" -- apparently signifying no message will follow -- or nothing -- meaning a message is coming. In this case, the callsign is followed by "7." This is the kind of thing that gets numbers stations enthusiasts very excited.
  • A plain vanilla E10 broadcast from 16 Jan 2000. Full message. 

E3: The Lincolnshire Poacher

Techno and electronica fans will love the Poacher. These broadcasts from British MI5 begin with a Casio keyboard rendition of a folk tune called the Lincolnshire Poacher. The transmitters are believed to be based in Cyprus and the broadcasts are thought to be aimed at the Middle East.

E5: The Counting Station

This apparently CIA-sponsored broadcast starts by counting to ten, reading out the callsign, counting to ten, reading out the callsign, counting to ten...

Are you seeing the appeal of this hobby yet?