Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4QA callsign genealogy
Currently held by KATZER, DAVID L
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 K4QA's current licensee, walking backwards.
- Bianchi, LeonardoFLgranted 2018-06-07cancelled 2021-05-07
Successor callsigns
Callsigns held now by people who previously held K4QA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4QA, oldest first.
- KATZER, DAVID L NC2011-03-15 → cancelled 2019-04-18
- Bianchi, Leonardo FL2021-05-07 active