I can confirm that the API has started returning 502 Bad Gateway or rarely 504 Gateway Timeout when the API is used from browsers on multiple devices (both Windows 10 OS computers and Android phones (the latter both when phone is using wireless and when using cellular data to access the internet)) from several different LANs. The API also now gives the same result when accessed from a C# application that has been working for years. Today the C# app was tested on several different Windows 10 machines at several different physical locations on different LANs all with the same error.
I cannot tell you exactly when this problem started. The API was working fine at all of our locations as recently as 7-23. Today an off-site user told me that the API was not working for him and when I went to verify his report I discovered the above. So somewhere in the interval between 7-23 and today things went awry.
The C# app also has the option of using other internet plane servers and when a non-opensky server is selected, the app still performs normally.
So whether the API is accessed via a web browser or via a C# app, at multiple sites there are 502 errors obtained with no plane data returned from the opensky network, with this problem developing here some time between July 23 and today.
Additional data:
ping opensky-network.org
Pinging opensky-network.org [194.209.200.2] with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 194.209.200.2:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),