Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5ZIM callsign genealogy
Currently held by MORRISON, GUY R
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 W5ZIM's current licensee, walking backwards.
- Zimmermann, Michael RTXgranted 2014-02-14cancelled 2014-03-04
Successor callsigns
Callsigns held now by people who previously held W5ZIM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5ZIM, oldest first.
- MORRISON, GUY R GA2000-01-25 → cancelled 2006-08-18
- Zimmermann, Michael R TX2024-01-18 active