Lincolnshire Poacher (numbers station)https://en.wikipedia.org/wiki/Lincolnshire_Poacher_(numbers_station)
The Lincolnshire Poacher was a powerful British shortwave numbers station that transmitted from HM Government Communications Centre near Gawcott in Buckinghamshire, England, and later from Cyprus, from the mid-1960s to June 2008. The station gained its commonly known name as it uses bars from the English folk song "The Lincolnshire Poacher" as an interval signal. The radio station was believed to be operated by the British Secret Intelligence Service.This link is apropos of nothing; it's just a specific numbers station I learned about recently and wanted to write down so that I don't forget the name.
When I first moved to Philadelphia, my car had a cheap AM/FM radio that I'd gotten from Craigslist after someone stole the vehicle's original radio console. I listened to a lot of AM radio in Atlanta (it's what all the hip hop and indie music stations used), and I was creeped out to find that the AM frequencies I'd saved on the radio's rudimentary display were all weather stations in Philadelphia, some of which broadcast in the weird dialect(s?) of German used by the Amish. I wonder if these sorts of stations still exist. They must, right?