Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KZ4IM callsign genealogy
Currently held by Zimmerman, Gordon K
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 KZ4IM's current licensee, walking backwards.
- Zimmerman, Gordon KGAgranted 2017-06-21cancelled 2017-09-09
Successor callsigns
Callsigns held now by people who previously held KZ4IM.
No current licensee on record previously held this callsign.