Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB4KX callsign genealogy
Currently held by Gruenwald, Toria 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 AB4KX's current licensee, walking backwards.
- Gruenwald, Toria MFLgranted 2022-02-28cancelled 2024-08-10
Successor callsigns
Callsigns held now by people who previously held AB4KX.
- VAUGHAN, DAVID BTNgranted 2021-03-05
All historical holders
Every license row we've seen with the callsign AB4KX, oldest first.
- VAUGHAN, DAVID B TN2010-08-31 → cancelled 2011-05-17
- Gruenwald, Toria M FL2024-08-10 active