Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD5TKS callsign genealogy
Currently held by Brzostowski, Matthew
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 KD5TKS's current licensee, walking backwards.
- Brzostowski, MatthewTXgranted 2025-09-10cancelled 2025-09-30
Successor callsigns
Callsigns held now by people who previously held KD5TKS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD5TKS, oldest first.
- Brzostowski, Matthew A TX2012-05-02 → cancelled 2024-08-01
- Brzostowski, Matthew TX2025-09-30 active