Priority Air Charter, LLC, a US carrier flying under ICAO code PRY and callsign PRIORITY AIR, currently shows no active flights on live flight tracking.
Original report
airplanes.live
A single operator's absence from live tracking data illustrates how flight-tracking coverage can vary independently of an airline's actual operational status.
Priority Air Charter, LLC, a United States-based carrier operating under the ICAO code PRY and radio callsign PRIORITY AIR, currently has no flights visible on the live flight tracking network. The airline's designator and radio telephony data are sourced from the FAA JO 7340.2 Contractions publication, Chapter 3 Section 3, which lists ICAO three-letter company designators.

AVI-GO, “Priority Air Charter, LLC (PRY) Shows No Active Flights on Live Tracking Network”. https://ai.avi-go.com/news/ai-news-center/news-briefs/priority-air-charter-llc-pry-shows-no-active-flights-on-live-tracking-39315f8d6893a4bf7d12d844d3928ffd
Figures carry an explicit measurement window — cite the window shown on this page, not the date you retrieved it.