Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4KTZ callsign genealogy
Currently held by FORTIN, JOSEPH A
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 K4KTZ's current licensee, walking backwards.
- Mercer, Cora FALgranted 2012-08-02cancelled 2015-05-29
Successor callsigns
Callsigns held now by people who previously held K4KTZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4KTZ, oldest first.
- FORTIN, JOSEPH A MA1994-10-19 → cancelled 2006-10-20
- Mercer, Cora F AL2025-03-05 active