Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4TFJ callsign genealogy
Currently held by JOHNSTON, TIMOTHY F
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 K4TFJ's current licensee, walking backwards.
- JOHNSTON, TIMOTHY FVAgranted 2009-10-14cancelled 2013-04-30
Successor callsigns
Callsigns held now by people who previously held K4TFJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4TFJ, oldest first.
- DUNCAN, GEORGE H AL1996-06-18 → cancelled 2008-06-19
- JOHNSTON, TIMOTHY F VA2023-04-12 active