Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KD4JBW callsign genealogy
Currently held by COX, MICHAEL H
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 KD4JBW's current licensee, walking backwards.
- WILLIAMS, JUSTIN BSCgranted 2022-03-11cancelled 2022-05-06
Successor callsigns
Callsigns held now by people who previously held KD4JBW.
- WILLIAMS, JUSTINSCgranted 2024-07-02
All historical holders
Every license row we've seen with the callsign KD4JBW, oldest first.
- COX, MICHAEL H TN2001-10-24 → cancelled 2014-01-22
- WILLIAMS, JUSTIN SC2022-05-06 → cancelled 2024-07-02