I have seen an increase in inaccurate aircraft registrations lately. It’s across multiple airlines, including Delta, Southwest, and Frontier from what I’ve seen so far.
One example is FFT1707 PHL-CVG today. FA is showing it is N353FR, but it really being operated with N337FR. I just witnessed it with my own eyes push off the gate. This is only one of many examples.
FlightStats is showing the correct info. I’m tempted to move my data feed needs to their service.