Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9ST callsign genealogy
Currently held by THELEN, STEVEN P
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 AC9ST's current licensee, walking backwards.
- THELEN, STEVEN PWIgranted 2016-09-26cancelled 2017-01-24
Successor callsigns
Callsigns held now by people who previously held AC9ST.
No current licensee on record previously held this callsign.