not tracking UAL946

Today the 19th, Flight aware is not tracking UAL946 from LAX to IAD. Why when it has been airborne for at least 30 minutes?

Here ya go…

flightaware.com/live/flight/UAL9 … /KLAX/KIAD

flightaware.com/live/flight/UAL946T

Same situation for UAL914 SFO-IAD. How do I know that I have to put a T in after flight number?

I just looked under the departures and used the “find” feature to find the two flights you mentioned. Here is the second one, only has an “L” and not a “T”.

flightaware.com/live/flight/UAL9 … /KSFO/KIAD