Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4KJW callsign genealogy
Currently held by Johnstone, Todd G
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 KD4KJW's current licensee, walking backwards.
- Johnstone, Todd GFLgranted 2024-11-19cancelled 2024-12-13
Successor callsigns
Callsigns held now by people who previously held KD4KJW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KD4KJW, oldest first.
- JOHNSTONE, TODD G FL1992-02-18 → cancelled 2004-02-19
- Johnstone, Todd G FL2024-12-13 active