Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6MCZ callsign genealogy
Currently held by Ziegler, Mark C
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 K6MCZ's current licensee, walking backwards.
- Ziegler, Mark CWAgranted 2018-04-24cancelled 2019-06-15
Successor callsigns
Callsigns held now by people who previously held K6MCZ.
- Ziegler, Mark CWAgranted 2026-04-11