Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3KFO callsign genealogy
Currently held by Spinnenweber, David R
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 K3KFO's current licensee, walking backwards.
- Spinnenweber, David RPAgranted 2015-03-02cancelled 2015-03-21
Successor callsigns
Callsigns held now by people who previously held K3KFO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K3KFO, oldest first.
- UZUPUS, JOSEPH A MD1996-08-23 → cancelled 2008-08-26
- Spinnenweber, David R PA2025-06-17 active