That's wild pretty interesting stuf!
^^^^^totally agree,heard this on ham and hf radio for years,I wonder what the gas can is doing behind the ham op?.burn and run if the "radio cops" come lol.It's neat stuff but older than dirt. Been hearing this stuff in the ham bands and outside since I first got a ham license in 1972. BTW International law says lots of stuff as far as who transmits where and its all controlled by the ITU (International Telecomminications Union) and several other lesser agencies. They have no police force except the UN and without the USA wasting their time on this crap....they dont have a police force to go after anyone. They simply beg and wimper and hope someone has pity on them!
Amateur radio bands are only enforced strictly in certain countries....Not everyone plays the game and the numbers stations are set up by GOVERNMENTS....Good luck on getting them to shut down! Keep in mind that MOST ham bands are set up world wide on a SHARED basis! The 80 Meter Band / 60 Meter Band / 40 Meter band / 30 meter band / 17 Meter Band / 15 Meter band are all shared bands worldwide and contain many utility/shortwave stations. The 160 Meter band was shared but when Radio navigation stations were done away with in favor of GPS systems it was handed over to Amateur Radio Ops. (BTW that's just the bands I can recall being shared off the top of my head...there are more LOL!)
Coded messages are only illegal on the ham bands if they are transmitted by amateur radio operators...Numbers stations set up by governments can do what they want and ANYWHERE they want to do it!