So. There is this cessna 172 breaking records in Canada right now:
https://globe.adsbexchange.com/?icao=c04f73
But wait... lets search that registration number... C-GECG
https://aviation-safety.net/wikibase/231636
This plane was in a crash... a very strange crash where the plane just slowly descended into the ground, with no comms from the pilot. But look at what this plane does and who for... Is it normal for the military to re-use registration numbers from supposed crashed flights?
"The occurrence flight was conducted on behalf of the United States Department of Commerce National Oceanic and Atmospheric Administration (NOAA) as part of the Global Greenhouse Gas Reference Network’s aircraft program.Footnote1 The program collects air samples at specified altitudes and locations across North America and stores them for later analysis."
Good research PF! EDIT: 42k ft and climbing! Max service ceiling is 13,000-15,000 feet ASL