Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4ZJJ callsign genealogy
Currently held by PLOTH SR, GEORGE 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 K4ZJJ's current licensee, walking backwards.
- Johnson, ZacharyTNgranted 2025-06-19cancelled 2025-07-08
Successor callsigns
Callsigns held now by people who previously held K4ZJJ.
- PLOTH SR, GEORGE FSCgranted 2013-12-13cancelled 2026-03-06
All historical holders
Every license row we've seen with the callsign K4ZJJ, oldest first.
- PLOTH SR, GEORGE F SC2013-12-13 → cancelled 2014-07-21
- Johnson, Zachary TN2025-07-08 active