Hello,
Here is a useful link, by OE1SMC,
http://hans.mayer.tv/html/beacon_calculator.html 6m - 50 MHz - hamradio searching the six meter beacons calculator for distance and azimuth You put your QRA LOCATOR and the distance required to know instantly all the beacons on six meters
in your particular area of choice.
So if you want to study the propagation around 2500 KM one hop or any other mode of propagation
you can reduce your search by changing the distance you want.
Try it in your area, and sometimes you will be surprised.
Good dx'ing,
Michel VE2TH