Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KC9DFZ callsign genealogy
Currently held by Mankus, Joseph 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 KC9DFZ's current licensee, walking backwards.
- Mankus, Joseph AINgranted 1995-03-29cancelled 2003-02-20
Successor callsigns
Callsigns held now by people who previously held KC9DFZ.
- Mankus, Joseph AINgranted 2025-05-13