I punched in the zip code of my very small (pop. ~4500) rural home town and was told there are "17 broadband providers" there.
That is waaaaay off.
That is waaaaay off.
Most were probably fixed wireless in where there are over a thousand, yet most people don't know they exist.
Next time you drive on a big highway look for the big circular antennas on the cell towers. (or smaller white ones).
Most of them were fiber providers who you can't actually get fiber from. I work for an ISP that does service this area and we tend to keep up on what's available in our service area.
Don't get me wrong -- I realize you're attempting a massive undertaking but, based upon the searches I did, there is a lot of incorrect data in your database.