FAA radar data is only supplied for aircraft in US airspace. Everywhere else in the world, the data comes from aircraft ADS-B transponder data, which is picked up by internet-enabled receivers. These are often peripherals attached to privately-owned PCs used by civilian Ham or radio enthusiasts. ADS-B is present on a limited number of airliners (about 70% of European/Asian, and 30% US; largely Airbus, some of the Boeings). The majority of civil aviation actually is not covered by this, nor are most smaller business jets, so all that you see are the big airliners.
I suspect the confusion over the term “flight radar” is coming from my example of the website by the name “flightradar24”. It and several other flight tracking websites use similar terminology, though their graphic displays do not get any direct input from any ATC system.
“Disintergration”. ......
Opps, one to many letters in that one, take out the “r after “inte”........(Its early)