Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF4PX callsign genealogy
Currently held by PETZOLD, RICHARD 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 KF4PX's current licensee, walking backwards.
- PETZOLD, RICHARD JTNgranted 2004-01-09cancelled 2004-06-05
Successor callsigns
Callsigns held now by people who previously held KF4PX.
No current licensee on record previously held this callsign.