Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4VFO callsign genealogy
Currently held by NIRENBERG, ALLAN
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 K4VFO's current licensee, walking backwards.
- Owen, Richard BALgranted 2004-05-21cancelled 2012-01-24
Successor callsigns
Callsigns held now by people who previously held K4VFO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4VFO, oldest first.
- NIRENBERG, ALLAN FL1998-03-19 → cancelled 2010-03-20
- Owen, Richard B AL2021-11-09 active