RadioActive wrote:

This one is in San Jose, California and claims to have been on the air on an experimental basis, playing records and taking requests as early as 1909 - a full decade before XWA in Montreal! It originally didn't have call letters, eventually became KQW and is now known as KCBS, San Francisco.

I doubt we'll ever entirely solve this, but several stations make the claim for being the first ever. The one above, XWA (later CFCF) Montreal, KDKA Pittsburgh and WWJ Detroit. We'll probably never know who really was first but it's fun to imagine what those early pioneers sounded like.

Site of the World's First Radio Broadcasting Station

I guess it is safe to say that "Station FN" did not air any commercials for American Trucker Magazine, I Heart Radio Small Business Crisis Resource, One Hour Cash For Cars dot Com and New Vitality Green Tea Extract... or PSAs from Selective Service, AARP and Visit The Forest..