Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KJ4KZ callsign genealogy
Currently held by MARTIN SR, KARL J V
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 KJ4KZ's current licensee, walking backwards.
- MARTIN SR, KARL J VALgranted 2021-12-10
Successor callsigns
Callsigns held now by people who previously held KJ4KZ.
- MARTIN SR, KARL J VALgranted 2021-12-10