Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KJ4F callsign genealogy
Currently held by LAWRENCE, JOSEPH 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 KJ4F's current licensee, walking backwards.
- BROWN JR, WATT YTNgranted 2002-05-14cancelled 2006-08-04
- KC4WFDno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held KJ4F.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KJ4F, oldest first.
- LAWRENCE, JOSEPH J GA1994-07-14 → cancelled 2006-07-15
- BROWN JR, WATT Y TN2016-11-08 active