As I have still no answer for my previous post, I will assume that the frequency that appears after the colon is the one that is active in the feed.
I have been checking and notice the frequency 13306 is one that is permanently active. The owner of the feed should switch to 5598 in the night time as this period requires a lower frequency for HF communications between pilots and Aeronautical Stations operators, otherwise there will be nothing to hear in HF NAT-A feed during night period.
Can you check that?
Tks