From FAA PDF (!) https://www.faa.gov/sites/faa.gov/files/2022-08/ADS-B_Ground_Stations_as_of_08-31-2018.pdf
found on https://www.faa.gov/foia/electronic_reading_room
[Grokked cyoung faa.txt file via Perl, hand-edit a few lines, convert to UFT-8. FAA PDF to CSV as .txt.]