Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KJ4ZIW callsign genealogy
Currently held by Barr Jr, 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 KJ4ZIW's current licensee, walking backwards.
- Barr Jr, David LVAgranted 2010-09-17cancelled 2010-11-29
Successor callsigns
Callsigns held now by people who previously held KJ4ZIW.
No current licensee on record previously held this callsign.