Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4XZ callsign genealogy
Currently held by SCHREIBER, SAM
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 K4XZ's current licensee, walking backwards.
- Patrick, Joseph WFLgranted 2002-09-13cancelled 2004-01-23
Successor callsigns
Callsigns held now by people who previously held K4XZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4XZ, oldest first.
- SCHREIBER, SAM FL1997-04-23 → cancelled 1997-07-31
- Patrick, Joseph W FL2024-01-12 active