Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ZF callsign genealogy
Currently held by MONROE, ROBERT B
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 K4ZF's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K4ZF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4ZF, oldest first.
- MONROE, ROBERT B FL1998-06-22 → cancelled 2004-07-14
- Morgan, Sean H GA2016-08-02 active