Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9PR callsign genealogy
Currently held by Kupferschmid, Mark K
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by AC9PR's current licensee, walking backwards.
- Kupferschmid, Mark KILgranted 2015-02-02cancelled 2017-03-01
Successor callsigns
Callsigns held now by people who previously held AC9PR.
No current licensee on record previously held this callsign.