Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5ZFN callsign genealogy
Currently held by MADDEN, ROBERT T
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 K5ZFN's current licensee, walking backwards.
- MADDEN, ROBERT TGAgranted 2003-07-10cancelled 2004-05-18
Successor callsigns
Callsigns held now by people who previously held K5ZFN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5ZFN, oldest first.
- SLOSS, RAYMOND LA1994-10-21 → cancelled 2004-02-23
- MADDEN, ROBERT T GA2025-11-21 active