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v1.602 database option could expand but I'll start this as a new topic..
Here's a link to the csv list of all AM Broadcast Stations in the US
I think the ITU Marine HF channels would be a good addition as they are an international allocation and good for a worldwide generic database. See about 1/2 way down this page
Likewise I think the ICAO Aeronautical High Frequency Enroute Network Major World Air Route Areas - MWARA allocations would also be a good basis for a worldwide generic database.
Oops appologies, I was looking in the wrong file.
The Aero allocations are already in the community database.