Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AC9TM callsign genealogy
Currently held by Csontos, Ryan M
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 AC9TM's current licensee, walking backwards.
- Csontos, Ryan MINgranted 2014-06-11cancelled 2018-08-07
Successor callsigns
Callsigns held now by people who previously held AC9TM.
No current licensee on record previously held this callsign.