I recently (9/16/2014) flew on Southwest PVD-BWI-PVD. One way was on a new 737-800 and the oher way was an old -300
I know both the tail numbers without doubt as I recorded them on boarding
However, the 737-800 N8648A has very limited tracking information in flightaware and the 737-300 N389SW is not recognized as a tail number at all
What is the reason I cannot see history for these two flights by tail number please ?