Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KD5II callsign genealogy
Currently held by ZELLMER, JON A
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 KD5II's current licensee, walking backwards.
- ZELLMER, JON AARgranted 1994-03-08cancelled 2003-08-15
Successor callsigns
Callsigns held now by people who previously held KD5II.
- HEIM, MICHAEL AOHgranted 2021-09-02