Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0AJN callsign genealogy
Currently held by TIMMERMAN, WARREN H
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 K0AJN's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K0AJN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K0AJN, oldest first.
- TIMMERMAN, WARREN H IA2004-12-08 → cancelled 2017-03-08
- Salkowski Jr, Joseph J IA2025-05-28 active