Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4SJF callsign genealogy
Currently held by Farrell, Stephen 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 K4SJF's current licensee, walking backwards.
- Farrell, Stephen JVAgranted 2022-08-19cancelled 2023-07-14
Successor callsigns
Callsigns held now by people who previously held K4SJF.
No current licensee on record previously held this callsign.