Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ZEN callsign genealogy
Currently held by RINK, WILLIAM 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 K4ZEN's current licensee, walking backwards.
- Maenner, Marcus TFLgranted 2008-07-22cancelled 2016-07-23
Successor callsigns
Callsigns held now by people who previously held K4ZEN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ZEN, oldest first.
- RINK, WILLIAM W FL2004-01-21 → cancelled 2016-03-23
- Maenner, Marcus T FL2026-05-13 active