VICE has an enlightening article (https://www.vice.com/en/article/dy8by7/why-channel-37-doesnt-exist-and-what-it-has-to-do-with-aliens?utm_source=pocket-newtab) on channel 37's history of why it ended up not being used for TV. It's one of those quirks that are leftover from the design of the original television broadcasting system. I think you guys would like it.