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As far as I know there is no international agreement on this. Altitude can vary from 30Km to 160Km.

Most countries seem to claim somewhere between 70Km and 100Km as their airspace.

If someone has more details on this, it's very welcome.




This master's thesis from 2005 ("The Vertical Limit of State Sovereignty") has a fairly comprehensive account of the history and present state of international law in this area:

http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA436627


I'm familiar with that. And the guy proposes 22Km as the limit.

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.




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