No it is not. in Russia you can use 13100 meters (F430) or 12100meters (F397) also.
Lastr week heard that one Jetflite aircraft got cleared by Moscow control to 15100meters (F495).
Around 2000nm in our XR seems to be ok up to 4 pax plus FA (landing in reasonable reserves), We have been with 2pax flyed from UUWW-OMDB 2280nm great circle without fuel stop (with help in wind and landed with 1500lbs), from OMDB to UUWW its always a fuel stop in Baku or Trabzone.