FlightAware Discussions

Are some planes MLAT exempt?

Are some aircraft exempt from being MLAT’ed? I’m seeing a Mode S only airplane in my list, but it never gets an MLAT location. I can tell from the RSSI that it’s close to me, it’s at altitude, and I have other Mode S aircraft in the vicinity getting MLAT locations. I know some planes are on a block list but I thought we would still get anonymized MLAT locations.