Any site that uses FAA data is required to block this aircraft, ie. FlightRadar24, FlightAware. You can still track it on ADSBExchange though.
Seen on LADD before we began logging dates. Last Seen on LADD: 2023-03-28
Aircraft Info: N4151T
ICAO: a4e940 Track on ADS-B Exchange ICAO Type: PA18 Manufacturer: PIPER Model: PA-18-150 Year: 1989 Owner: STATE OF ALASKA, DEPARTMENT OF PUBLIC SAFETY Military: False