Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0ZAC callsign genealogy
Currently held by FEHRENBACH, FRANK E
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 W0ZAC's current licensee, walking backwards.
- Zullig, Zachary LMOgranted 2021-09-01cancelled 2021-11-23
Successor callsigns
Callsigns held now by people who previously held W0ZAC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0ZAC, oldest first.
- FEHRENBACH, FRANK E KY2009-07-09 → cancelled 2021-07-12
- ZULLIG, ZACHARY L MO2021-11-23 active