Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4DFB callsign genealogy
Currently held by NASSAR, RICARDO 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 KC4DFB's current licensee, walking backwards.
- BERGWALL, DAVID FNCgranted 2015-04-09cancelled 2015-05-02
Successor callsigns
Callsigns held now by people who previously held KC4DFB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC4DFB, oldest first.
- NASSAR, RICARDO J FL1988-02-02 → cancelled 2000-02-03
- BERGWALL, DAVID F NC2025-04-23 active