For my website, I'm looking for a database of world transition altitudes.
I found, some monthes ago, a file named transalt.csv but I can't retrieve it despite many searches on internet.

Perhaps one of you knows where it is possible to obtain these datas (database, excel files, text file or other formats).

You can have a glance at my site devoted to flying simulation : https://simu.alain-bettan.fr

Any help or idea would be appreciated, thank you in advance