Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AA9BT callsign genealogy
Currently held by Tienken, Louis C
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 AA9BT's current licensee, walking backwards.
- Tienken, Louis CARgranted 2012-09-26cancelled 2016-03-29
Successor callsigns
Callsigns held now by people who previously held AA9BT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA9BT, oldest first.
- RENAUD, DONALD E WI2002-07-23 → cancelled 2014-07-24
- Tienken, Louis C AR2016-03-29 active