I was listening to my radio at work this morning and around 2 a.m. right in the middle of a song the music faded out and the radio went silent. It wasn't staticy like the station was off the air, it was silent like the station was on the air but it wasn't transmitting. Then I heard a man's voice repeating four digit sets of numbers. Such as 1 2 3 4 - 2 3 4 5 - 3 4 5 6- 4 5 6 7. The man would repeat four groups and then the radio would go silent for 2 minutes or so and he'd repeat the same four groups again. Then the radio would go silent for another 2 minutes and again he'd repeat the same four groups of numbers. Then he would stop and after about a minute my station would come back. I wasn't paying close enough attention to tell if he was repeating the same 4-Digit groups but this went on approximately every 20 minutes from 2 a.m. to 4 a.m. It was obviously some kind of code but I was thinking drug dealers or the numbers racket or something like that. So I Googled it and apparently there's a thing called a Number Station. A number station transmits coded messages to its own intelligence agents operating in a foreign country. According to everything I read no government on the face of the Earth will admit that they use these radio stations but they broadcast all over the world, usually on shortwave. However according to what I read last night North Korea broadcasts on FM which I assume would mean that they have to be broadcasting from somewhere in the United States. When I lived in Florida in the mid-80s radio Cuba would broadcast from Havana and their signal was so powerful that it would override radio stations as far north as Tampa. I remember one country station in particular although I can't remember the call letters that they would override every Saturday for about 4 hours. When I lived in Germany I heard radio Moscow a couple of times. I think you had to have radio that was tuned to European frequencies to get it but I heard it a couple of times when I was on guard duty. And I'm sure some of what they were broadcasting had to be code but I'd never heard anything like this. This station had to be Broadcasting nothing but coded messages. I wonder what I was listening to last night.