Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4JKF callsign genealogy
Currently held by KEIM, JACKIE
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 W4JKF's current licensee, walking backwards.
- Freeman, Joshua KGAgranted 2011-05-10cancelled 2015-03-20
Successor callsigns
Callsigns held now by people who previously held W4JKF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4JKF, oldest first.
- KEIM, JACKIE FL2003-02-28 → cancelled 2015-03-03
- Freeman, Joshua K GA2025-01-07 active