Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA9TM callsign genealogy
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 AA9TM's current licensee, walking backwards.
- MACK, TOM RILgranted 1998-03-19cancelled 2003-02-05
Successor callsigns
Callsigns held now by people who previously held AA9TM.
- PORENTO, ROBERT AINgranted 2017-07-19
All historical holders
Every license row we've seen with the callsign AA9TM, oldest first.
- Mack, Thomas R IL2024-02-09 active
- —— → cancelled 1997-10-14