By the way, can anyone find locations of those stations?
A check of FR24 map shows several airports within range from the crash site. Sharm El Sheikh is pretty far. Eilat is only 100 km away, but there's a line of hills west of the city which may be blocking the line of sight. But two airports in Tel Aviv are 200 km away, and, if they were already tracking it, they should have been able to see it at least down to 15000' if it were transmitting all the way down.