Searching google by date the first non-FCC listing for KM4UDZ is a Corsi ebook? July 26, 2017

https://avalonlibrary.net/ebooks/Jerome%20R.%20Corsi,%20Ph.D%20-%20Killing%20the%20Deep%20State%20-%20The%20Fight%20to%20save%20President%20Trump.pdf