Confidence: Medium · Source: FCC ULS · As of 2026-09-09
K4RZZ callsign genealogy
Currently held by STOCK JR, THOMAS 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 K4RZZ's current licensee, walking backwards.
- STOCK JR, THOMAS BFLgranted 2020-02-08cancelled 2024-11-08
Successor callsigns
Callsigns held now by people who previously held K4RZZ.
- STOCK JR, THOMAS BFLgranted 2024-11-26