Looking typical Russian design. This Antonov is owned by Antonov themselves, but I don’t think they are for sale. UR-09307 is the only registration I can find.
With the fuel you use to get concorde over the atlantic, I think you could get a 767 freighter to Las Vegas. Freight compânies have to be very careful with their plane usage. Concorde even couldn’t be a freighter because it’s so small. Whata stupid idea.
The highest I’ve been is 37000 feet on a Dc10. Is it true a 744 is running at full power and is just able to keep .855 mach at 32.000 feet, and starts it descent at, say, 38.000 feet? That’s more efficient.