Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3ESJ callsign genealogy
Currently held by JAXHEIMER III, WILLIAM H
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 K3ESJ's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held K3ESJ.
- JAXHEIMER III, WILLIAM HPAgranted 2020-06-02