Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KE4ZUM callsign genealogy
Currently held by WERTS, JOHN 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 KE4ZUM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KE4ZUM.
No current licensee on record previously held this callsign.