Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1ZAX callsign genealogy
Currently held by Madsen, Jens
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 W1ZAX's current licensee, walking backwards.
- Madsen, JensCAgranted 2017-06-29cancelled 2017-08-25
Successor callsigns
Callsigns held now by people who previously held W1ZAX.
No current licensee on record previously held this callsign.