Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4UM callsign genealogy
Currently held by Goebel, Carl J
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 KZ4UM's current licensee, walking backwards.
- Goebel, Carl JTNgranted 2024-11-22cancelled 2025-06-24
Successor callsigns
Callsigns held now by people who previously held KZ4UM.
No current licensee on record previously held this callsign.