Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD9ZEN callsign genealogy
Currently held by LORENTZEN, DAVID F
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 KD9ZEN's current licensee, walking backwards.
- LORENTZEN, DAVID FWIgranted 2020-12-10cancelled 2020-12-29
Successor callsigns
Callsigns held now by people who previously held KD9ZEN.
No current licensee on record previously held this callsign.