Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4ALZ callsign genealogy
Currently held by CARLSEN, ROBERT W
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 K4ALZ's current licensee, walking backwards.
- FINAN SR, GERALD WKYgranted 2010-01-26cancelled 2013-11-19
Successor callsigns
Callsigns held now by people who previously held K4ALZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ALZ, oldest first.
- CARLSEN, ROBERT W FL1994-02-22 → cancelled 2006-02-23
- FINAN SR, GERALD W KY2013-11-19 → cancelled 2026-03-07