Most countries seem to claim somewhere between 70Km and 100Km as their airspace.
If someone has more details on this, it's very welcome.
http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA436627
Besides, a lot has changed in the use of airspace and space in the last 8 years.
Yet, I don't know of any authoritative source for the actual current claims of most countries.
Most countries seem to claim somewhere between 70Km and 100Km as their airspace.
If someone has more details on this, it's very welcome.