BLEEP BLOOP: I just saw an aircraft with callsign #JBU458 (ICAO code #A73DFE) flying at 306 kt at altitude 8750 feet MSL at coordinates 34.2896,-118.4769.

Southwest pilots would be jealous. Oh wait, was that Southwest?

https://globe.adsbexchange.com/?icao=a73dfe
https://www.openstreetmap.org/?mlat=34.2896&mlon=-118.4769#map=15/34.2896/-118.4769