Wikipedia has this page https://en.wikipedia.org/wiki/Flight_information_region containing a table of all FIR (with ICAO codes) and their respective authority countries.
Is there any place where I can download an updated list like this one as a CSV file (or XML)?
I need to do some automatic calculation of overflight costs. For that I have a set of calculation formulas from IATA, but they are based on authority country, and my input is based on the FIR, that the actual flight is passing through. Therefore I need some way to find the authority country for each specific FIR.
I would prefer somehow to be able to automatically download a fresh list once in a while. I'm not yet sure, how often these data might change.