Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K8ZIM callsign genealogy
Currently held by Zimmermann, Timothy 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 K8ZIM's current licensee, walking backwards.
- Zimmermann, Timothy JMIgranted 2016-05-24cancelled 2017-04-08
Successor callsigns
Callsigns held now by people who previously held K8ZIM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K8ZIM, oldest first.
- BARTLETT, FORREST E FL2004-07-13 → cancelled 2016-07-14
- Zimmermann, Timothy J MI2017-04-08 active