I ask because I have had every N number for every aircraft owned by the OK Dept of Public Safety listed in my custom alerts, even aircraft unlikely to be used for vascar like King Airs for well over a year and 1/2 now and have never gotten any alerts for any flights other than OHPs helicopter and OKC PDs Air One helicopter. I find it impossible that the state dept of public safety has like 20 aircraft and none of them have taken to the skies in over a year and a half... I've looked up their N numbers again, and they all seem valid. None expired or anything. Thoughts? Thanks.