Sites which have been discovered via a method such as Unitrunker's peer/neighbor sites listing (which is reported by other nearby P25 sites). Unitrunker will display the site zone, ID #, and primary control frequency, but no other info. However, they have not been fully mapped as to where they are located precisely, their call sign, or their full frequency listing.
I'm basing this on how I discovered Site 225 in this method while mapping other nearby towers. I have that site down to somewhere near Holly Grove, AR, but it is using a state of Arkansas 700 Mhz blanket license, so haven't fully found the tower location yet.
I'm not a database admin, but I am guessing they are set as statewide sites in the hopes somebody will discover their location and be able to map them.