Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9PF callsign genealogy
Currently held by Spinler, Mark D
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 AC9PF's current licensee, walking backwards.
- Spinler, Mark DWIgranted 2016-10-25cancelled 2016-11-16
Successor callsigns
Callsigns held now by people who previously held AC9PF.
No current licensee on record previously held this callsign.